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JAN 9

Sentinel Flurry

Golden, CO
The Sentinel Flurry returns for the 2026-2027School year! It will take place on January 9th, 2027. Participants can sign up for the 1 mile, 5K or the Combo. Combo participants will run both the 5K and the 1 Mile. Course maps can be found here. Families of 4 or more can sign up for a flat rate of $100. Be sure to choose this option from the drop down on the registration page. Event Schedule: 8:15 am - Bib Pick Up 9:00 am - 1 Mile 9:30 am - 5K Enjoy hot chocolate and festive vibes throughout the event!
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JAN 16

ALMAGEDDON Winter Triathlon presented by the Alma Foundation

Alma, CO
Going into its second year, ALMAGeddon is the kind of race where athletes need to be ready for anything. Starting at 10,600 feet in the heart of the Colorado Rockies, you never quite know what Old Man Winter has in store. Snow? Wind? Bluebird skies? A little bit of everything? That's all part of the adventure. While we can't guarantee the exact distances or even the disciplines, we can guarantee an unforgettable grassroots race experience. Expect a small field where everyone knows your name, genuine small-town hospitality, epic mountain scenery, and a warm, delicious post-race meal courtesy of our legendary One Pot Cook-Off Challenge. Registration is limited to just 60 athletes, so don't wait. Secure your spot now and join us for one of the most unique winter endurance events you'll ever experience. PROCEEDS FROM YOUR RACE ENTRY FEES AND YOUR DONATIONS BENEFIT PARK COUNTY SEARCH AND RESCUE  Because we are wishful thinking for a really good snow year we have updated the
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JAN 16

MLK Jr. Freedom Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO
Join in our annual Martin Luther King Jr. Day Run! Today, we gather to honor the legacy of Dr. King and his enduring commitment to justice, equality, and peace. As we lace up our shoes and hit the pavement, let’s reflect on his powerful message of love and resilience.This event is not just about fitness; it’s a celebration of community, a call to action for social change, and a reminder of the work still to be done. Together, we can honor Dr. King’s dream and inspire one another to continue striving for a better world. Let’s run with purpose and passion!  Forget the massive, impersonal race-day crowds. We keep things small, personal, and local, so every run feels less like a number and more like a memory. Whether it's a 5K, 10K, half-marathon, or virtual run, you'll get the warmth of a hometown event.   Overview:Spots sell out FAST! We close each wave the moment it fills. Once a wave sells out, you can grab the virtual run option or join the waitlist. This is a smaller, private
5K10K
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JAN 16

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Centennial, CO
Chase the Sun, Crushing your Goals! 🏃‍♀️💨 Welcome to the 2027 Sunrise Marathon 5K/10K/13.1! There is no better way to start your day than stepping up to the starting line just as the world wakes up. Forget the massive, impersonal race-day crowds. We keep things small, personal, and local, so every run feels less like a number and more like a memory. Whether it's a 5K, 10K, half-marathon, or virtual run, you'll get the warmth of a hometown event. Overview: Spots sell out FAST! We close each wave the moment it fills. Once a wave sells out, you can grab the virtual run option or join the waitlist. This is a smaller, private group run with a capped field per wave - so it never feels crowded, and you're never just a bib number. All paces and ages welcome (under 18 with a guardian) - run it, walk it, however you like! There's no gear, no setup, no fuss - just you, the course, and our coordinators cheering you on in a relaxed, stress-free setting. When you sign up, you're not just registering for a race - you're getting real support toward your fitness goals, plus an invite to join one of our local run clubs to keep the momentum going. Timing: Optional! Track your own time via Strava, RunKeeper, Nike Run, or similar, then submit it through our easy online form to get posted. Or just ask a coordinator to help time you. No timing chips - this is about progress, not pressure. What You Get (Swag Bag): - Running T-shirt (shipped to your address - US only) - Finisher's medal - Virtual Training Run (emailed to you a month before your run) - Online results & certificate of completion - Invitation to join a local running club - NEW: Upgrade to a lightweight, moisture-wicking technical shirt for just $5 more Packet Pickup? Skip It. No lines, no hassle - your swag ships straight to your door. (Double-check your full US mailing address, including apartment number, when you register as your shirt is sent to this address!) Race bibs are simply handed out on race day. When Will My Swag Arrive? Your shirt will land at your mailing address the week of your race. Signing Up Last Minute? (Within 2 Weeks of the Race) No problem - just know shipping may not catch up in time, so your shirt could arrive after race day. No worries, though: wear whatever you like and come run with us anyway! When Will I Receive get the Course Map and Details? We'll send a final participant info by the Wednesday before race day with all the details and course maps. Wave Times (Once you've registered, use your confirmation number to reserve a wave here.) Wave A: 7:30 AM Wave B: 8:00 AM Wave C: 8:30 AM Running late? Jump in when you arrive - our coordinators stay on-site for 3 hours after the first wave. Times may be subject to change depending on seasons, please check your participant info email! Got more questions? Check our FAQ. Virtual Run Option Prefer to run on your own time? Our Virtual Run includes a digital training pack to keep you on track. Run it whenever, wherever, with any tracking device you like (optional) — then send your results to info@thebestraces.com to claim your medal. Race Bundle Sign up for multiple races and save with a bundle discount. Sponsorships & Promoting Your Business Want to put your business in front of our community? We'd love to feature you as a sponsor. Learn more Team Glo Volunteers Love helping people cross finish lines? Join our volunteer team and help bring these community runs to life. Sign up here Be Part of the Journey Discover our charity initiatives at https://www.thebestraces.com/runforothers/ Got a mission that helps people around the world? Let us help you fundraise at no cost to you. Smaller Races, Warm Memories, Always Ready for You
5K10KMarathon
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JAN 17

Colorado Cold Snap

Louisville, CO
Baby, it's cold outside... And we're gonna take it on, because that's what living in Colorado is all about. Let's conquer the elements together at this WINTERY January 5k/10k race. We're staying cool in Colorado, one mile at a time! Starting at Louisville's Coal Creek Golf Course and running through neighborhoods, past fairways and along ponds and open spaces, the wintery 5k/10k sometimes has sun and 65* without a cloud in the sky and sometimes, we're up against negative temps and blowing snow.  What will this year bring?  Are you up for the challenge?
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JAN 23

Chilly Willy 5K/10K/Half Marathon - Colorado Springs

Colorado Springs, CO
Bundle up and get ready to race! The Chilly Willy 5K/10K/Half Marathon is the perfect way to kick off the new year with some frosty fun and a whole lot of miles. Whether you’re tackling the 5K, digging deep for the 10K, or braving the full Half Marathon, this winter-themed event brings runners together for a crisp, refreshing challenge that celebrates the season. Every participant will earn a finisher medal, a well-deserved reward for braving the chill and crossing that finish line. We’ll also be presenting overall and age-group awards for each distance in the usual 5-year categories starting at 10 & under, giving runners of all ages a chance to shine. We'll be starting at 8:30 am at Cottonwood Creek Park. It's wrapped in cool winter vibes, complete with themed swag, an energetic race atmosphere, and a finish-line experience that makes every shiver worth it. The event is designed for everyone—from first-time 5K walkers to seasoned half-marathoners looking to start the year
5K10KHalf Marathon
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JAN 23

12 Hours of Sunlight

Glenwood Springs, CO
The mountain is calling. How will you answer? The 12 Hours of Sunlight returns in 2027 for its third year btter than ever and is ready to test what you’re made of. For 12 relentless hours, determination becomes momentum, teammates become family, and every lap asks the same question: Do you have another one in you? Take it on solo or share the challenge with a team of two or four. Whatever your approach, this is more than a race. It’s a journey into the night, a battle against the clock, and a chance to discover how far you can go when your legs say stop but your spirit says climb. The Challenge Race to complete as many laps as possible in 12 hours on Sunlight’s 1.3-mile Sun King uphill route, gaining 1,800 vertical feet with every ascent. Skin up. Ski down. Repeat. Compete as: An individual A two-person team A four-person team Race Check-In Every racer will receive a bib. Bib pickup details will be announced closer to race day. Members of the same team will share a bib number. Racer swag will be distributed at the conclusion of the race. Required Gear Every racer must carry and use: A headlamp(for the early and late laps) A helmet Downhill-rated skis or a splitboard Helmets are mandatory on every downhill segment. Snowshoes and uphill-only skis are not permitted. Hydration and Fuel A fully stocked hydration and fueling station will be located at the start/finish line, with a variety of race-day essentials to help keep you moving throughout the challenge. Drop-Bag Zones Racers may use either of two convenient drop-bag areas: An outdoor zone at the start/finish line An indoor zone in the lodge, approximately 250 feet away The Finish When the final lap is complete, gather in the lodge for food, drinks, giveaways, and a well-earned celebration. Top individuals and teams will receive prizes and lift tickets for the 2025/26 season. Important Registration Information There will be no race-day registration. Secure your place in advance. Racers under 18 must have a parent, coach, or guardian present for the entire race. The clock will keep moving. The mountain will keep asking. And somewhere between the first climb and the final descent, you may meet a stronger version of yourself. Answer the challenge. Register today and see how many times you can rise in 12 Hours of Sunlight. Race Map
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JAN 24

Yeti Chase 5k/10k

Morrison, CO
Colorado's FUNNEST Winter Run!!!  The Yeti Chase 5K & 10K take place at beautiful Bear Creek Lake Park in Lakewood. This is the 16th year for the Yeti Chase, and it has sold out well before race day in all previous years. After chasing down the Yeti, runners wander the park's 2,500 acres, known for it's diverse bird and waterfowl population as well as stunning views of the foothills.  The 5k follows a mostly flat course with gradual ups and downs, while the 10k is a rolling course with more challenging hills. The race offers something for everyone, with gender specific adult size shirts & youth size shirts for the kids, hot chocolate and other yummy post-race food, and a chance to win a $500 summer stay at one of the Summit Cove properties in Keystone!!! Free Park Entrance for all Runners Gender Specific Race ShirtsDiscounted Youth 5k Entry FeeSteaming Hot CocoaLive Online ResultsPrinted Results ReceiptJill's Home Baked Banana Chocolate Chip BreadFREE Race Photo
5K10K
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JAN 24

Freakin Freezin 5K - Denver

Denver, CO
It's that time of year when brave runners lace up, layer up, and take on the chill! The Freakin' Freezin' 5K is all about starting the new year with some frosty fun and cool determination. Whether you're chasing a personal best or just out to shake off the winter blues, this race is your chance to embrace the cold, test your grit, and have a blast doing it. So bundle up, hit the course and show everyone you're tough enough to run when it's Freakin' Freezin'!   We're coming to Northfield High School for a flat 5K run. Finisher medals for all! Awards to the Top 3 overall M/F, Top 3 overall masters M/F, Top 3 Overall Grand Masters M/F, Top 3 Overall Senior Grand Masters M/F, and top three in the 5 year age groups.
5K
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JAN 24

Redrum Run

Estes Park, CO
The Redrum Run is a scenic 7 mile race located in the heart of the Rocky Mountains. Runners will pass by some of Estes Park's most iconic spots, including The Stanley Hotel, downtown Estes Park, and the Lake Estes trail. Race weekend will kick off with packet pickup at our Redrum Runner's Expo on Saturday. Featuring vendors, local businesses and a kid's zone, the expo is free to attend and open to the public. On Sunday, the race will start at 10:00am at the Estes Park Event Center. Spectators can line the sidewalks along Elkhorn Ave to see runners pass through downtown or return to the Estes Park Event Center to watch the live stream, hosted by Rocky Mountain Channel.
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JAN 30

Time Travel Half-Marathon/5K/10K - Denver

Denver, CO
Are you ready to have a roaring good time? Welcome to the ultimate prehistoric Time Travel adventure – the Prehistoric Park Theme: 5K, 10K, and Half Marathon! Gear up for a journey through time, where dinosaurs once ruled the Earth and now, they are your running companions. Whether you're a seasoned runner or a first-time participant, this event promises an adventure like no other. Secure your spot, lace up your shoes, and get ready to run through time at the Time Travel 5K, 10K, and Half Marathon. Let the dino-mania begin! This is a fun, family event for all ages with all distances!  Half Marathon registration includes a custom bib, super soft tee, awesome finisher medal, and 13.1 pin! 10k registration includes a custom bib, super soft tee, and an awesome finisher medal! 5k registration includes a custom bib, a super soft tee, and an awesome finisher medal! 1-mile registration is untimed and includes a custom bib, super soft tee, and challenge pin! The kid's dash is a fun
5K10K
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JAN 30

Alley Loop

Crested Butte, CO
The Alley Loop is not your typical Nordic Marathon… It stands both as a premier American Birkebeiner Qualifying event, in addition to being Crested Butte’s most outrageous costume party of the year!  The course winds its way through snowy streets, alleyways and narrow bridges through the heart of downtown Crested Butte.  You’ll find yourself cheered by town revelers as you navigate a crazy gliding costume assemblage…  Racers are sometimes forced into making daring passes and depending on their luck, may even get waylaid on a bridge for a moment.  Once you make it through town, you are rewarded by pristine tracks and exhilarating vistas throughout the Crested Butte Nordic trail network. If you like normal, you may want to look for another race.  If you are up for anything… this is right up your alley!
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JAN 30

Coffee Lover Run DENVER/AURORA

Centennial, CO
☕️ 🏃‍♂️ ☕️ 🏃‍♂️ ☕️ 🏃‍♂️ For all the Coffee Lovers, this run is for you! You’ll love the shirt we send you. Set a goal, bring a friend, and join this super fun 5K/10K/13.1 Half-Marathon! 😊 Forget the massive, impersonal race-day crowds. We keep things small, personal, and local, so every run feels less like a number and more like a memory. Whether it's a 5K, 10K, half-marathon, or virtual run, you'll get the warmth of a hometown event. Overview: Spots sell out FAST! We close each wave the moment it fills. Once a wave sells out, you can grab the virtual run option or join the waitlist. This is a smaller, private group run with a capped field per wave so it never feels crowded and you're never just a bib number. All paces and ages welcome (under 18 with a guardian) - run it, walk it, however you like! There's no gear, no setup, no fuss - just you, the course, and our coordinators cheering you on in a relaxed, stress-free setting. When you sign up, you're not just registering for a race - you're getting real support toward your fitness goals, plus an invite to join one of our local run clubs to keep the momentum going. Timing: Optional! Track your own time via Strava, RunKeeper, Nike Run, or similar, then submit it through our easy online form to get posted. Or just ask a coordinator to help time you. No timing chips - this is about progress, not pressure. What You Get (Swag Bag): - Running T-shirt (shipped to your address - U.S. only) - Finisher's medal - Virtual Training Run (emailed to you a month before your run) - Online results & certificate of completion - Invitation to join a local running club - NEW: Upgrade to a lightweight, moisture-wicking technical shirt for just $5 more Packet Pickup? Skip It. No lines, no hassle - your swag ships straight to your door. (Double check your full U.S. mailing address, including apartment number, when you register as your shirt is sent to this address!) Race bibs are simply handed out on race day. When Will My Swag Arrive? Your shirt will arrive at your mailing address the week of your race. Signing Up Last Minute? (Within 2 Weeks of the Race) No problem - just note that shipping may not catch up in time, so your shirt could arrive after race day. No worries, though: wear whatever you like and come run with us anyway! When Will I Receive the Course Map and Details? We'll send final participant info by the Wednesday before race day with all the details and course maps. Wave Times (Once you've registered, use your confirmation number to reserve a wave here) Wave A: 7:30 AM Wave B: 8:00 AM Wave C: 8:30 AM Running Late? Jump in when you arrive - our coordinators stay on-site for 3 hours after the first wave. Times may be subject to change depending on seasons, please check your participant info email! Got more questions? Check our FAQ. Virtual Run Option Prefer to run on your own time? Our Virtual Run includes a digital training pack to keep you on track. Run it whenever, wherever, with any tracking device you like (optional) — then send your results to info@thebestraces.com to claim your medal. Race Bundle Sign up for multiple races and save with a bundle discount. Sponsorships & Promoting Your Business Want to put your business in front of our community? We'd love to feature you as a sponsor. Learn more. Team Glo Volunteers Love helping people cross finish lines? Join our volunteer team and help bring these community runs to life. Sign up here. Be Part of the Journey Discover our charity initiatives at https://www.thebestraces.com/runforothers/. Got a mission that helps people around the world? Let us help you fundraise at no cost to you. Your Race | Your Journey | Your Story
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JAN 30

Run for Donut DENVER/AURORA

Centennial, CO
🎈🍩 Donut Mind If I Do! 🏃‍♂️💨 Get ready for a race day fueled by laughter, community, and a shared love for the world's best treat! 🍩✨ The 2027 Run for Donut is the ultimate celebration for runners who believe that fitness and sweet cravings can go hand in hand. Complete your challenge your way, celebrate your passion, and let’s make some unforgettable memories together! 📸🏆 Forget the massive, impersonal race-day crowds. We keep things small, personal, and local, so every run feels less like a number and more like a memory. Whether it's a 5K, 10K, half-marathon, or virtual run, you'll get the warmth of a hometown event. Overview: Spots sell out FAST! We close each wave the moment it fills. Once a wave sells out, you can grab the virtual run option or join the waitlist. This is a smaller, private group run with a capped field per wave - so it never feels crowded, and you're never just a bib number. All paces and ages welcome (under 18 with a guardian) - run it, walk it, however you like! There's no gear, no setup, no fuss - just you, the course, and our coordinators cheering you on in a relaxed, stress-free setting. When you sign up, you're not just registering for a race - you're getting real support toward your fitness goals, plus an invite to join one of our local run clubs to keep the momentum going. Timing: Optional! Track your own time via Strava, RunKeeper, Nike Run, or similar, then submit it through our easy online form to get posted. Or just ask a coordinator to help time you. No timing chips - this is about progress, not pressure. What You Get (Swag Bag): - Running T-shirt (shipped to your address - US only) - Finisher's medal - Virtual Training Run (emailed to you a month before your run) - Online results & certificate of completion - Invitation to join a local running club - NEW: Upgrade to a lightweight, moisture-wicking technical shirt for just $5 more Packet Pickup? Skip It. No lines, no hassle - your swag ships straight to your door. (Double-check your full US mailing address, including apartment number, when you register as your shirt is sent to this address!) Race bibs are simply handed out on race day. When Will My Swag Arrive? Your shirt will land at your mailing address the week of your race. Signing Up Last Minute? (Within 2 Weeks of the Race) No problem - just know shipping may not catch up in time, so your shirt could arrive after race day. No worries, though: wear whatever you like and come run with us anyway! When Will I Receive get the Course Map and Details? We'll send a final participant info by the Wednesday before race day with all the details and course maps. Wave Times (Once you've registered, use your confirmation number to reserve a wave here.) Wave A: 7:30 AM Wave B: 8:00 AM Wave C: 8:30 AM Running late? Jump in when you arrive - our coordinators stay on-site for 3 hours after the first wave. Times may be subject to change depending on seasons, please check your participant info email! Got more questions? Check our FAQ. Virtual Run Option Prefer to run on your own time? Our Virtual Run includes a digital training pack to keep you on track. Run it whenever, wherever, with any tracking device you like (optional) — then send your results to info@thebestraces.com to claim your medal. Race Bundle Sign up for multiple races and save with a bundle discount. Sponsorships & Promoting Your Business Want to put your business in front of our community? We'd love to feature you as a sponsor. Learn more Team Glo Volunteers Love helping people cross finish lines? Join our volunteer team and help bring these community runs to life. Sign up here Be Part of the Journey Discover our charity initiatives at https://www.thebestraces.com/runforothers/ Got a mission that helps people around the world? Let us help you fundraise at no cost to you. Smaller Races, Warm Memories, Always Ready for You
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JAN 30

Rio Frio 5k

Alamosa, CO
One of America’s most unique 5k races kicks off at 10:00 a.m. Saturday, January 30th, 2027. This spectacular 5k race is conducted entirely on the frozen Rio Grande when conditions allow. Have you ever run on a frozen river? Don't fret; a thin layer of snow offers traction while you take in the majestic views of the San Juan’s to the West and Sangre de Cristo’s to the East from the heart of the San Luis Valley! Runner's World Magazine named this race one of three "editor's picks" for running enthusiasts for 2015. Chip timing and unique “ice-themed” awards enhance this special race for runners of all abilities. Backup Racecourse: In the 12-year history of this race, we have had to use an alternate racecourse five times due to unsafe ice depth on the Rio Grande. We have an alternate racecourse as a backup that still provides for a fun and unique "5k on Ice" experience. We utilize the 30-acre pond at Blanca Vista Park and a portion of levee trail system for the 5k. So regardless, you will take in great views and run on ice/snow! Footwear: Participants wear a variety of footwear to run fast and to stay safe. We recommend running shoes with microspikes or a DIY version of microspikes. Here is a video showing you how to improve traction for snow and ice on your own running shoes if no traction device, hiking boots or other shoes that provide a little extra tread are recommended! Race Packet Pickup: This is a chip-timed race. Race bibs, chips, and swag bags are available for pickup from 6:00 p.m. to 7:30 p.m. at Knee Knockers Bar & Grill on Friday, Jan. 29th, 2027, and from 8:00 a.m. to 9:30 a.m. at the Alamosa Senior Citizens Center the day of the race. Knee Knockers Bar & Grill 500 Cottonwood Dr Alamosa, CO 81101 Race Shirt Information Please note: Race registration does not include a shirt. Shirts may be purchased separately for $15 during registration. Preorder deadline: December 31, 2026. After this date, shirts will only be available for purchase at the event (while supplies last).
5K
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JAN 31

Time Travel Half-Marathon/5K/10K - Colorado Springs

Colorado Springs, CO
Are you ready to have a roaring good time? Welcome to the ultimate prehistoric Time Travel adventure – the Prehistoric Park Theme: 5K, 10K, and Half Marathon! Gear up for a journey through time, where dinosaurs once ruled the Earth and now, they are your running companions. Whether you're a seasoned runner or a first-time participant, this event promises an adventure like no other. Secure your spot, lace up your shoes, and get ready to run through time at the Time Travel 5K, 10K, and Half Marathon. Let the dino-mania begin! This is a fun, family event for all ages with all distances!  Half Marathon registration includes a custom bib, super soft tee, awesome finisher medal, and 13.1 pin! 10k registration includes a custom bib, super soft tee, and awesome finisher medal! 5k registration includes a custom bib, a super soft tee, and an awesome finisher medal! 1-mile registration is untimed and includes a custom bib, super soft tee, and challenge pin! The kid's dash is a fun, u
5K10K
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FEB 6

All-Out Mardi Crawl

Arvada, CO
Get ready for the 11th annual Mardi Crawl, where we blend a wonderful winter run with a festive Mardi Gras celebration, Colorado-style! Starting from the amazing Colorado Tap House in Arvada, you can choose your challenge: relatively gentle 5K and 10K courses, or a more challenging half marathon course. All races take you along the acclaimed Ralston Creek Trail, featuring shady, creekside beauty through Arvada's picturesque open spaces and charming golf course communities. Mardi Crawl is also an official BOLDERBoulder Qualifying event! Use your finish time from any distance in this race to qualify for BOLDERBoulder's qualified waves. This event also is part of the endless series with Runapalooza. This is a can't-miss opportunity to experience the best of what Colorado has to offer!
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FEB 6

Stories Trail Runs

Colorado Springs, CO
The Human Potential Running Series Presents:The Stories Trail Runs @ Cheyenne Mountain State Park The Stories Trail Runs is a unique winter trail running adventure taking place in Colorado Springs, CO, against the breathtaking backdrop of Cheyenne Mountain, and “America’s Mountain,” Pike’s Peak, with sweeping views of the Colorado Front Range below. This event features an amazing community atmosphere, made possible by our main staging area and aid station at the start and finish of each loop. The Stories timed events (15-hr and 6-hr) are unique in that, rather than repeating loops on the same 1-2 mile track, participants will enjoy multiple loops spread out through Cheyenne Mountain State Park. Timed events are also unique in that runners are challenged with running as many miles as they can or want within their allotted time. Our trail 10k, Half Marathon, and 20-Mile round out the weekend as traditional distance options where runners can still enjoy the communal aspect of HPRS whi
trail
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FEB 6

Westy Winter Waggle 5&10k

Westminster, CO
It's the Westy Winter Waggle 5&10k!  Come waggle with us along an accurately measured, professionally timed course where you're welcomed by super friendly volunteers who wanna waggle with ya in the Colorado snow season! Come out for a Brrrrisk Brrrrun and chose your distance!
10K
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FEB 6

The Heathen Challenge

Glenwood Springs, CO
The Heathen 2027 A Colorado skimo tradition steps onto the national stage. Colorado’s longest continuously running ski mountaineering race returns to Sunlight Mountain Resort in 2027. Presented by Strafe Outerwear, Cripple Creek Backcountry, and Sunlight Mountain Resort, The Heathen is built around the roots of the sport: demanding climbs, technical transitions, hard-earned descents, and a community that knows the best days rarely come easy. This year, The Heathen has been selected as a sanctioned National Cup race and will be part of the USA Skimo 2026/27 National Cup calendar. National-level competition is coming to Sunlight, but the heart of the event remains the same: move through the mountains, test your limits, and share the course with people who understand that suffering can be its own kind of celebration. Seasoned racer or first-time competitor, there is a place for you at The Heathen. Just be ready to earn it. Registration closes at 4 p.m. on Friday, February 5. Elite Race Approximately 11 miles with 5,500 feet of elevation gain Built for experienced racers and committed backcountry athletes, the Elite course delivers an unforgiving mix of skinning, skiing, bootpacking, and rapid transitions. It will test your endurance, efficiency, judgment, and resolve from the opening climb to the final descent. The mountain will ask plenty of questions. Your legs will have to answer them. Recreational Race Approximately 6 miles with 2,000 feet of elevation gain The Rec division is an ideal entry into skimo racing and a worthy challenge for any mountain athlete. The course may be shorter, but it still demands strong climbing, confident skiing, efficient transitions, and enough determination to keep moving when the easy choice would be to stop. This is no casual tour. It is The Heathen. Course Information The Heathen is known for maximizing backcountry-style skiing and skinning across Sunlight’s terrain. Course maps offer a general picture of what to expect, but all routes are subject to change based on snow, weather, operational needs, and safety considerations. Final mileage and vertical gain may vary. Bib Pickup Will be announced closer to the race Race Rules and Safety The race director may delay the start, modify the course, or cancel the race because of snow, weather, or safety conditions. Racers must follow all directions from race staff, course marshals, and Sunlight Mountain Resort employees. The race takes place within an operating ski area. Racers must yield to resort guests at all times. Failure to do so will result in immediate disqualification. On uphill sections, racers must remain in the established skin track or within five feet of the course markings. On downhill sections, racers must remain within 30 feet of the course markings. All transitions must take place within 20 feet of the designated transition point. Racers must submit to equipment checks when requested, including before the race or at the finish. Every racer, regardless of category, must use a ski-retention device such as brakes or leashes. Lightweight Nordic equipment is not permitted in either division. Helmets must be worn for the entire race. Bike, ski, climbing, and ski-mountaineering-specific helmets are permitted. Any racer who withdraws must report to a course marshal or the finish area. Failure to check in may trigger a search. Racers must be prepared for rapidly changing mountain weather, including snow, high winds, and extreme cold. Come race for National Cup points. Come chase a personal best. Come find the edge of what you thought you could do. The Heathen is waiting. Register now and meet it on the mountain in 2027.
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FEB 7

Old Man Winter Bike Rally & Run

Lyons, CO
Old Man Winter Bike Rally & Run is a must-do Colorado endurance festival with mixed terrain adventures for all levels of riders and runners. All runs and rides are followed by a community after party with bonfires, hot food, great bands, s'mores, saunas, and more.
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FEB 13

Heart Throb 5k

Arvada, CO
Are you a Heart Throb?  Grab your best running buddy and come on out to Johnny Roberts Memorial Park just down from Olde Town Arvada.  Celebrate the ability to get your heart pumping by cruising through this flat and fast 5k run (or walk!)  Many participants choose this event to 'earn' the rich foods they will consume on Valentine's Day!  You don't have to be fast to get that heart churning.  Be a Heart Throb! Sign Up today!
5K
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FEB 13

Valentine's Day Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO
💘 Celebrate love and fitness this Valentine’s Day with our charming Valentine's Run! Whether you’re running solo, with a partner, or with friends, this event is all about spreading love and joy.  Let’s make this Valentine’s unforgettable! Sign up today and let the love run wild! Forget the massive, impersonal race-day crowds. We keep things small, personal, and local, so every run feels less like a number and more like a memory. Whether it's a 5K, 10K, half-marathon, or virtual run, you'll get the warmth of a hometown event.   Overview:Spots sell out FAST! We close each wave the moment it fills. Once a wave sells out, you can grab the virtual run option or join the waitlist. This is a smaller, private group run with a capped field per wave so it never feels crowded and you're never just a bib number. All paces and ages welcome (under 18 with a guardian) - run it, walk it, however you like! There's no gear, no setup, no fuss - just you, the course, and our co
5K10K
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FEB 13

Run for Chocolate 5K/10K/13.1 DENVER/AURORA

Centennial, CO
🔥 Run Now, Chocolate Later! 😋🏆Who says you can't have your chocolate—and run it too? The 2027 Run for Chocolate is coming, and it’s sweeter than ever! 🎉Rally your friends, set your pace for our 5K/10K/13.1 Half-Marathon, and let the craving guide you to the finish line. It’s not just a race; it’s a chocolate lover's paradise in motion! 🍫❤️🏃‍♀️   Forget the massive, impersonal race-day crowds. We keep things small, personal, and local, so every run feels less like a number and more like a memory. Whether it's a 5K, 10K, half-marathon, or virtual run, you'll get the warmth of a hometown event.   Overview:Spots sell out FAST! We close each wave the moment it fills. Once a wave sells out, you can grab the virtual run option or join the waitlist. This is a smaller, private group run with a capped field per wave so it never feels crowded and you're never just a bib number. All paces and ages welcome (under 18 with a guardia
5K10K
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FEB 14

Ralston Creek Half Marathon & 5k

Arvada, CO
The Ralston Creek races feature a fun winter half-marathon and 5K run conveniently located on the west side of the Denver Metro Area in Arvada, Colorado. The courses cover a scenic mix of road and bike path over rolling terrain, and an optional early start time for half-marathon runners who expect to take more than 2 hours 45 minutes to complete the course! Half-Marathon entry is limited to the first 650 registrations. 5K registration is limited to the first 350 entries. Once a distance has filled, we cannot accept any additional entries for that distance. Your entry fee includes entry into the race, a finisher's medal (for half-marathon runners who complete the course), FREE race photo downloads, fun music, hot cocoa and tasty quesadillas fresh off the grill!!! Long sleeve adult tech shirts will be included with all half marathon entries. 5k entries will come with a short sleeve t-shirt or an upgrade to a long sleeve tech shirt for $5. This is also the final race in the Racing Und
5KHalf Marathon
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FEB 14

Gothic Mountain Tour

Crested Butte, CO
A beautiful circumnavigation of Gothic Mountain. The Gothic Mountain Tour features a 23.5-mile competitive race and a 17.85-mile recreational race around the majestic Gothic Mountain. This race is unique, tough, and beautiful. The perfect place to test your Grand Traverse systems. The Gothic Mountain Tour is operated as a fundraising event for Crested Butte Nordic, a 501(c)(3) recreational non-profit organization.
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FEB 14

The Toyota Super Half Marathon™& Game Day 5K™

Colorado Springs, CO
The streets and trails of downtown Colorado Springs are not exactly the "Frozen Tundra of Lambeau Field," but on Super Bowl Sunday, Feb. 14, 2027, more than 1,500 runners will race for paydirt there in the 15th Toyota Super Half Marathon & Game Day 5K. This is Colorado Springs' Super Sunday Tradition! We have a flat and fast race course, indoor packet pick-up at Plaza of the Rockies, and a great post-race party and awards at Jack Quinn's Irish Pub! This race supports the Pikes Peak Road Runners, celebrating 50 years of supporting running, racing and healthful living in the Pikes Peak Region.  New this year! Race registration discounts for Pikes Peak Road Runners and Southern Colorado Runners members. Read below to join the Pikes Peak Road Runners. Don't wait! Choose your distance and get in the game! The Toyota Super Half Marathon & Game Day 5K!
5KHalf Marathon
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FEB 17

2026 C.O.P.S. WINTER RACE SERIES

Golden, CO
The Colorado Outdoor Pace Series ("C.O.P.S.") is a unique set of races presented by Golden Mountain Runners and Golden Endurance. The cost for a single race is $30.00.  The cost for the whole series (6-8 races) $100.00.  T Race Dates January 7, 2026 - 5KJanuary 21, 2026 - 45 Minute Timed RaceFebruary 4, 2026 - 10KFebruary 18, 2026 - 60 Minute Timed RaceMarch 4, 2026 - 15KMarch 18, 2026 - 90 Minute Timed RaceApril 1, 2026 (Backup Snow Date/Non-Series Bonus Race)April 15, 2026 (Backup Snow Date/Non-Series Bonus Race)
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FEB 20

Chilly Cheeks Duathlon

Englewood, CO
Race & Entry Information The Chilly Cheeks event is held in the traditional duathlon format of Run-Bike-Run.  Both runs will be 2.5 miles and the bike course will be 10.8 miles.  As always, we will provide a marked and marshaled course, fast & accurate chip timing, light refreshments including Jill's famous banana chocolate chip bread, and some fun mid-winter competition in the heart of Denver. All athletes who enter before February 1st will get a pair of Chilly Cheeks Sweat Pants included with their entry! These are perfect for pulling on post-race or for lounging around the house.  Those who enter on February 1st or later will have the option to purchase a pair while supplies last. New this year: If snuggly warm Chilly Cheeks sweatpants aren't your thing, you can choose the "No Pants for Me" option and save $10 on your entry fee. We will be conducting an awards presentation on race day in the following categories: OPEN CATEGORY: (Any bike is acceptable - no e-
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FEB 27

Run Together Against Breast Cancer DENVER/AURORA

Centennial, CO
🎀 Join the Fight: Breast Cancer Run! 🎀Lace up and make a difference at our annual Breast Cancer Run! Together, we can raise awareness and funds to support those affected by breast cancer. Enjoy a spirited day filled with community, inspiration, and hope. Let’s unite for a cause that touches us all and run for a future without breast cancer! Sign up now and help us make a lasting impact! Forget the massive, impersonal race-day crowds. We keep things small, personal, and local, so every run feels less like a number and more like a memory. Whether it's a 5K, 10K, half-marathon, or virtual run, you'll get the warmth of a hometown event.   Overview:Spots sell out FAST! We close each wave the moment it fills. Once a wave sells out, you can grab the virtual run option or join the waitlist. This is a smaller, private group run with a capped field per wave so it never feels crowded and you're never just a bib number. All paces and ages welcome (under 18 with a guardi
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FEB 27

Run For Mental Health DENVER/AURORA

Centennial, CO
Join the "Run for Mental Health"! A journey of hope and connection. 💙 Every step is a reminder that no one has to face life’s challenges alone. Whether running for yourself or someone you love, your stride makes a difference. Let's break the stigma together! 🏃‍♀️🏃‍♂️💨 Run with purpose. Run with heart! 💪   Forget the massive, impersonal race-day crowds. We keep things small, personal, and local, so every run feels less like a number and more like a memory. Whether it's a 5K, 10K, half-marathon, or virtual run, you'll get the warmth of a hometown event.   Overview:Spots sell out FAST! We close each wave the moment it fills. Once a wave sells out, you can grab the virtual run option or join the waitlist. This is a smaller, private group run with a capped field per wave so it never feels crowded and you're never just a bib number. All paces and ages welcome (under 18 with a guardian) - run it, walk it, however you like! There
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FEB 28

Highlands Ranch 5k

Highlands Ranch, CO
Winter never disappoints us when racing in February in Highlands Ranch!  You won't feel chilly after a course so hilly!  After conquering the 5k, warm up with hot apple cider or hot cocoa at the finish line in your new FINISHER mug! Click the "race info" tab above and scroll through the drop-down menu for more race info! On your phone? Click the three lines at the top of the page!  ------------------------------------------------------------------------------------------------ Groups of 5 or more receive $5 off registration! See our FAQ page for more info!
5K
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MAR 5

Defiance Challenge

Glenwood Springs, CO
The Defiance Challenge isn’t just an endurance event, it’s a heart-pounding, adrenaline fueled showdown that tests grit, skill, and sheer determination! Open to expert skiers and riders ages 6 and up, this epic two-person team race pushes competitors to their limits as they battle to rack up the most runs in a grueling 10-hour marathon on the slopes. The bar is set high: the legendary record of 49 runs—an astonishing 66,792 vertical feet—was established in 2020 by the unstoppable duo, Aidan Corcoran and Nate Grosscup. Can you and your partner rise to the occasion and shatter this milestone? The action kicks off at 7 a.m. sharp outside the main Sunlight lodge with a Le Mans-style start that’s as chaotic as it is thrilling. At the sound of the starting gun, racers explode into motion, sprinting to their waiting skis or snowboards, snapping into their bindings, and charging toward the Segundo chairlift. From there, it’s a non-stop, high-speed adventure as teams conquer 40 challenging routes, including every double black diamond Sunlight has to offer. Whether you're here to make history or just prove you’ve got what it takes, the Defiance Challenge promises a day of unforgettable thrills and fierce competition. Are you ready to defy the limits? Let the countdown begin!
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MAR 6

Time to Paddy 5K/10K & Lucky 13.1 13.1 - Denver

Denver, CO
Join us for the annual Time to Paddy 5k/10k and Lucky 13.1 Half Marathon! A St. Patrick-themed run that is perfect for the whole family. The fun includes great swag (designer shirt, custom medal), chip-timing, live results and awards, free photos, a "biggest team" contest, a kids' dash, great post-race food, and plenty of fun! Grab your friends and family, you are not going to want to miss this one! Can't make the race? No problem! We offer a virtual race option where you can run anywhere, at any time, and still earn the fun swag! *Youth-based pricing for the 5k/10k, 12 & Under are only $17! Half Marathon Registration includes a custom bib, designer shirt, awesome finisher medal! 10k registration includes a custom bib, designer shirt, and an awesome finisher medal! 5k registration includes a custom bib, designer shirt, and an awesome finisher medal! 1 Mile registration includes a designer shirt and an awesome finisher medal! The kid's dash is a fun, untimed
5K10K
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MAR 6

Sharin' O' The Green 5k

Fort Collins, CO
8:50 AM - Pushrim/Wheelchair START 9:00 AM - 5k Run/Walk START  The Fort Collins St. Patrick’s Day 5K is equal parts road race and rolling block party—a point-to-point (or as we call it, Point-to-PINT 🍻) downhill 5k run/walk that starts in the heart of downtown Fort Collins and finishes where the real celebration begins: Odell Brewing Company. Whether you’re chasing a fast time or just cruising in green with friends and family, this festive course delivers momentum, music, and plenty of reasons to linger after you cross the line. Every participant is welcomed with a custom event T-shirt and immediate entry into a full-scale post-race party featuring a beer garden, food and beverage, live music, awards, vendors, giveaways, and that unmistakable St. Paddy’s Day energy Fort Collins does so well. Come for the run. Stay for the celebration. This is how Fort Collins kicks off St. Patrick’s Day—on its feet, together, and ready to cheers a great finish with pints of beer and possible P
5K
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MAR 7

Time to Paddy 5K/10K & Lucky 13.1 - Colorado Springs

Colorado Springs, CO
Join us for the annual Time to Paddy 5k/10k and Lucky 13.1 Half Marathon! A St. Patrick-themed run that is perfect for the whole family. The fun includes great swag (designer shirt, custom medal), chip-timing, live results and awards, free photos, a "biggest team" contest, a kids' dash, great post-race food, and plenty of fun! Grab your friends and family, you are not going to want to miss this one! Can't make the race? No problem! We offer a virtual race option where you can run anywhere, at any time, and still earn the fun swag! *Youth-based pricing for the 5k/10k, 12 & Under are only $17! Half Marathon Registration includes a custom bib, designer shirt, awesome finisher medal! 10k registration includes a custom bib, designer shirt, and an awesome finisher medal! 5k registration includes a custom bib, designer shirt, and an awesome finisher medal! 1 Mile registration is untimed and includes a custom bib, designer shirt, and an awesome finisher medal! The kid&
5K10K
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MAR 12

7th Annual Skidola: Telluride's Winter Uphill Race

Telluride, CO
The Telluride Foundation, in partnership with the Peter Inglis Avalanche Education Fund (PI Avy Fund), is hosting the seventh annual Skidola, Telluride’s winter uphill race, on Friday, March 12th. The Skidola is an open-registration, on-snow uphill race from the Town of Telluride to the San Sophia Ridge. Racers can compete using microspikes, snowshoes, skis, or splitboards. All racers will receive a Skidola buff and prizes will be awarded to the top male and female finishers, best costume, and middle-place racer. This is a family-friendly race, welcoming both competitive racers and those who just want to have fun! All proceeds benefit the PI Avy Fund and its mission to expand avalanche education and backcountry user awareness in the San Juan Mountains. A huge thank you to our 2026 sponsors: Jagged Edge, Alpine Bank, Disco Swell, Home Loan Insurance, a Division of Mountain West, Telluride Center for Dentistry, & Telluride Properties Forbes, Community Banks of Colorado, Alpine Club. Bib Pick Up Thursday, March 11th 3 - 6 p.m. at Jagged Edge (223 E. Colorado Ave, Telluride, CO 81435) Friday, March 12th 4 - 5:30 p.m. at Oak Street Plaza (250 San Juan Ave, Telluride, CO 81435) Skidola Schedule 4 p.m. - 5:15 p.m. Race Bib Pick up at Oak 4:30 p.m. - 6:45 p.m. Pies for PI Silent Auction, donate or bid on delicious pies for an excellent cause. 5:30 p.m. The Skidola Race begins! 6:45 p.m. Awards in front of Oak Patio 7 p.m. Race Timing ends
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MAR 13

22nd Annual Run Through Time Trail Marathon and Half Marathon

Salida, CO
2027 Race Date is Saturday, March 13.  Registration will open on November 1.  Race Results will be updated live here throughout the day.Thank you to everyone for a great day at this year's Run Through Time!  Race photos are now up - click on the link below.  Chelsea Tuttle did a great job as our race photographer this year.  Please tag her in any social media!  Run Through Time 2026 Marathon and Half Marathon Photos by Chelsea TuttlePhotos from Callie Cooper are also now up - please tag Callie as well with any social media! Run Through Time 2026 Photos by Callie CooperA big thank you to Callie and Chelsea for all of their work out on course!We have one more photo album to share from spectator Dzesika Teresko! The 22nd Annual Run Through Time Marathon, Half Marathon, and 2 Mile Run will take place on Saturday, March 13, in Salida, CO. These beautiful, challenging courses are run on dirt/jeep roads and narrow, hilly single track with fantastic views of Salida and the Arkansas Valley.
Half Marathontrail
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MAR 13

Erin Go Bragh 7.77k

Westminster, CO
Join us for the annual Erin Go Bragh 7.77k! This is THE LUCKIEST race on earth! There may not be a real pot of gold at the finish line of this happy-go-lucky fun run, but there WILL be UNLIMITED Lucky Charms, a Dance Party, and more! Woot Woot!  Teams or groups of 5 or more participants save $5 each! More info HERE.
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MAR 14

Lucky Brew Race 5K, 10K, 15k & Half Marathon

Severance, CO
Celebrate the luck of the Irish at Lucky Brew! All participants will receive chip timing, photos, Lucky Brew performance shirt and a great after party, complete with beverages, food, awards for top finishers and more!
5K10KHalf Marathon
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MAR 20

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Centennial, CO
🌅Run at Sunrise with pretty scenic views! Start your day — and your journey — with a breathtaking sunrise and fellow runners chasing greatness.   Overview:Run will sell-out QUICK! We will close off waves the moment they fill up. If waves are sold out, you can sign-up for the virtual run option or wait list. This is a smaller, private group run with a cap per wave. All paces and ages (under 18 with guardian) are welcome - Run or Walk!   There's no equipment or setup, this is a pure run with our coordinators to support you in a warm, stress-free setting! When you sign-up, we give you the support you need to help you achieve your goals and fitness. We also invite you to be part of our local run clubs that supports your fitness journey.  Timing: - Timing is Optional: You may track your time on an app (Strava, RunKeeper, Nike Run, etc) and submit your times with our easy form to be posted online. Or you can ask our coordinators to help keep track of your time.  - No timing chips
5K10KMarathon
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MAR 20

St. Paddy's Day Lucky Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO
🍀 St. Paddy's Day Run: Luck, Laughs, and Laces! 🍀Celebrate St. Patrick’s Day with a fun and festive run that’s as much about the spirit of the holiday as it is about the finish line! Whether you're running, walking, or just along for the ride, this 5K/10K/13.1 is the perfect way to enjoy the day with friends, family, and fellow revelers.Dress up in your favorite green gear—shamrocks, leprechaun hats, and everything in between—and join us for a race full of fun and good cheer! Forget the massive, impersonal race-day crowds. We keep things small, personal, and local, so every run feels less like a number and more like a memory. Whether it's a 5K, 10K, half-marathon, or virtual run, you'll get the warmth of a hometown event.   Overview:Spots sell out FAST! We close each wave the moment it fills. Once a wave sells out, you can grab the virtual run option or join the waitlist. This is a smaller, private group run with a capped field per wave so it never feels
5K10K
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MAR 21

All-Out Spring Fever

Golden, CO
From the base of Table Mountain and Colorado's spectacular foothills, All-Out Multicourse presents our 13th annual Spring Fever from Jefferson County's NAAC Stadium… easily accessible from several nearby highways. Along with its Endless Series sidekick in October, Kooky-Spooky, these 5K, 10K & Half Marathon courses will hug the shores of Arvada's Blunn Reservoir via the Ralston Creek Trail and will challenge the beginner and veteran athlete alike!
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MAR 21

Central Park 5k

Denver, CO
Is it spring or still winter?  We'll know when we run the Central Park 5k at the end of March!  Celebrate the end of winter with us on this flat and fast course in the historic Central Park neighborhood! ----------------------------------------------------------------------------------------------------------------------------------------- Race day info including packet pick-up info, race day schedule, course info, and MORE, can all be found by clicking "Race Info" above and navigating the drop-down menu!
5K
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MAR 21

Spring Equinox

Wellington, CO
Celebrate Spring with an early season race on scenic country roads.
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MAR 27

Always Hope Easter Run DENVER/AURORA

Centennial, CO
🐣🏃‍♀️Hop Into Action at the Always Hope Easter Run!  Spring into the season with purpose, community, and fun! Whether you're chasing a personal best, strolling with family, or hunting for a reason to get moving, the Always Hope Easter Run has a place for you on the starting line. Forget the massive, impersonal race-day crowds. We keep things small, personal, and local, so every run feels less like a number and more like a memory. Whether it's a 5K, 10K, half-marathon, or virtual run, you'll get the warmth of a hometown event.   Overview:Spots sell out FAST! We close each wave the moment it fills. Once a wave sells out, you can grab the virtual run option or join the waitlist. This is a smaller, private group run with a capped field per wave so it never feels crowded and you're never just a bib number. All paces and ages welcome (under 18 with a guardian) - run it, walk it, however you like! There's no gear, no setup, no fuss - just you, the course, a
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MAR 27

SuperHeroes Run DENVER/AURORA

Centennial, CO
Not all superheroes wear capes—some wear running shoes! ✨From everyday champions like dedicated moms 🤱, healthcare heroes & front-line workers 🚑, to the loyal friends who always have your back🤝. Everyone has a superpower that makes the world a better place. 🌟This run is dedicated to YOU and every real-life hero among us! Whether you run, jog, or power-walk, every step you take proves that you make a difference.    Forget the massive, impersonal race-day crowds. We keep things small, personal, and local, so every run feels less like a number and more like a memory. Whether it's a 5K, 10K, half-marathon, or virtual run, you'll get the warmth of a hometown event.   Overview:Spots sell out FAST! We close each wave the moment it fills. Once a wave sells out, you can grab the virtual run option or join the waitlist. This is a smaller, private group run with a capped field per wave so it never feels crowded and you're never just a bib number. Al
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MAR 28

The Grand Traverse

Crested Butte, CO
The Elk Mountains Grand Traverse was conceived by Jan Runge in the 1990s. The race’s genesis was partially based on the historical mail routes that connected the Colorado mining towns of Crested Butte and Aspen in the 1880s.  It also drew inspiration from the Patrouille des Glaciers, a point-to-point ski race in Switzerland which Runge had become familiar with in the 80s.  In 1998, with the help of the community, Runge sent a brave field of competitors from Crested Butte, over the Elk Mountains, to Aspen. It worked, and the Extraordinary Backcountry Ski Race was born. In 2012, event ownership was transferred to Crested Butte Nordic. The race is now a major fundraiser for the organization. In 2014 the Grand Traverse summer events were launched. Now the Grand Traverse features a winter ski race, a summer mountain run, and a mountain bike race.
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APR 3

Grand Valley Oncology - Life In Color 5K

Grand Junction, CO
This is a 5K fund raiser for Grand Valley Oncology. This year we are raising money for our Gas & Lodging program. The program offers travel assistance and lodging for out of town patients seeking oncology care.  The 5K course is composed of 3 and half loops around the perimeter of the Community Hospital and includes a mix of road, sidewalk and gravel path. Participants will run through showers of food grade colored powder for the ultimate color experience! We want to make this event fun for all ages and accessible to all ability groups. Participants have the option to signup for the timed 5K or the Fun Run/Walk .  Both options are the same course.  Timed 5K participants receive a timing chip on their bib and will be lined up in the first wave of the race.  Fun Run participants will not receive a bib and can take the course at their own pace and have fun along the way. We chose the theme of Life in Color because cancer comes in all different "colors" and we want to fund rais
5K
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APR 4

Three Creeks Half Marathon

Englewood, CO
FULL WEBSITE AT:  http://www.racingunderground.com/threecreeks/   Welcome to Denver's Best Spring Half Marathon! Sunday April 5, 2026 at Cherry Creek State Park Racing Underground brings you an amazing half marathon this spring! The Three Creeks Half Marathon features a half marathon course that is flat, fast and scenic! Travel on foot through some of the most beautiful parts of Cherry Creek State Park, with a total combined elevation gain of only 291 feet spread out over 13.1 miles as the course follows the banks of Cherry Creek, Windmill Creek, and Cottonwood Creek on a mix of road, paved running trail, and wide dirt trails. We hope to see you at the 13th annual Three Creeks Half this April! Darrin, Jill,and the Racing Underground Crew
Half Marathon
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