Event details subject to change. Please confirm all information via event website.
Summit 200
The Summit 200 has always been a dream race for us. The route is extraordinary in both its beauty and difficulty. Runners traverse one 200-mile loop around Summit County, Colorado […]
Chile Harvest Triathlon
The Socorro Chile Harvest Triathlon has been running for 25+ years!! This race is a 400 m swim in the City of Socorro pool, with a 20 km bike ride […]
Wild West Relay
The Wild West Relay is a scenic point to point running adventure across Colorado. Starting in Fort Collins, teams of any size or individuals, run over mountain passes, through open […]
Rocky Mountain 5K
Escape to the mountains for some fresh air! With the Rocky Mountain Half Marathon, 5K, and Elk Double (half marathon + 5K) you can choose your own adventure! The Rocky […]
Rocky Mountain Half Marathon
Escape to the mountains for some fresh air! With the Rocky Mountain Half Marathon, 5K, and Elk Double (half marathon + 5K) you can choose your own adventure! The Rocky […]
Backcountry Marathon
Utilizing the beautiful trails that surround Aspen, and now offering three distances - 50K, marathon and heavy half-marathon, all of which run almost exclusively on dirt trails. For the first […]
Sheep Mountain Ultras
Make no mistake, the elevation profile for The Sheep Mountain 50 mile and 50k are docile looking. However, the average elevation of over 10,500’ and copious amounts of aggressive terrain, […]
Popsicle 5K
What better way to end these HOT summer days than with a Popsicle 5K, AND WE'VE ADDED A 10K & HALF MARATHON?!! Come join us for a 5K, 10K, or […]
Run for the Ring 5K
The 12th annual Run for the Ring 5K Run/Walk and Kids Fun Run brings together Barbara Davis Center for Diabetes (BDC), patients, loyal supporters, and running enthusiasts to run for […]
Flying Colors 5K
Join us for an untimed Fun Run/Walk to benefit Hospice in our community. The run will kick off a fun weekend in conjunction with the Moffat County Hot Air Balloon Festival. […]
Kennebec Mountain Run
Join us for the Kennebec Mountain Run, a challenging 15-mile trail run through the stunning La Plata Mountains of southwest Colorado. Test your alpine running skills on this rugged course […]
Unicorn 5K
Ready to get off the sofa and gallop around Highlands Ranch with some friends? Yeah, you are! Come frolic with us at the Unicorn Runner 5k in Highlands Ranch to […]
Two Brothers Up-and-Down 5K/10K
Run your slowest 5K, then turn around and run your fastest at the Two Brothers Up-and-Down 10K on August 28th in Idaho Springs. This race climbs 1,800' in 5K and then turns around and goes back down!
Move with MADD 5K
Together We Can End Impaired Driving For Good! The 2026 Move With MADD Denver is Mothers Against Drunk Driving (MADD)'s signature fundraising event to help us raise awareness and funds […]
Steps to Empower 5K
Join us at Mount Saint Francis of Assisi on August 1st for a morning of community and purpose! Whether you prefer a scenic 1-mile stroll or want to tackle our […]
Wicked Wine Run
Founded in 2013, Wicked Wine Run is the longest running and most participated Wine Run in the country. Our journey began with a passion for combining fun, fitness, and fantastic […]
RunAbilities FUN Run
Join Parker Recreation and Square Peg Therapies for our annual RunAbilities FUN Walk/Run/Roll! The two-mile, fully accessible course begins at Cottonwood Park and on to the Cherry Creek Trail.
Snowshoe Shuffle 5K
An out and back 5K Run for all abilities in the beautiful setting of Creede, Colorado. Numerous age group prizes for both runners and walkers. Long sleeved tech tshirt for […]
Mountain Swim Series III
Racers at this beautiful reservoir will have 1 mile, 2 mile and 5K swim options. The swim will be at Willow Creek Reservoir northwest of Granby, Colorado. All swimmers must […]
Bound for Boston Marathon
Have you been dreaming of running Boston? Need to shave a few minutes off your time to qualify? Looking for the perfect course to set a PR? Regardless, if you […]
Stagecoach Gravel Triathlon
We didn't get the chance to launch this race in 2020, but that didn't diminish our passion for this brand new style of triathlon! To say this race is “unique” […]
Dirty Dozen Trail 10K
New Castle Trails’ 2026 Downvalley Dirty Dozen is a reimagining and celebration of trail running, mountain biking, music, and community. The weekend is full of fun including live music from regional bluegrass […]
Eltuck Valley 5K
Lory State Park 708 Lodgepole Dr, Bellvue, CO, United StatesJoin us each Tuesday evening in August for a fun series of shorter midweek trail races. Our goal is to offer a fun, low-key series of races designed to give […]
Eldorado Springs Run for the Cure
Founded in 1979, the Eldorado Run for the Cure is the longest operating charitable footrace in the State of Colorado. All proceeds from the annual four-mile run benefit the Colorado […]
Canceled High Five 100
In 2018 local ultra runners of Lake City came together to create a challenge meant to shake even the most elite runners to their core. What we came up with […]
Jane Welzel Mountain Avenue Mile
Civic Center Park - Fort Collins Fort Collins, CO 80521, Fort Collins, CO, United StatesWhat is better than one day of running? TWO days of running! The Choice City Running Event on August 5th and 6th at Civic Center Park in Fort Collins has something for everyone. Kick off a weekend with the Jane Welzel Mountain Avenue Mile on Friday evening! Continue running strong the following day with the Human Race Half Marathon, 10K, and 5K. The party continues both days in the park with live music, vendors and a New Belgium beer garden!
Ute 100
The Ute 100 is the highest and most scenic race in Utah, taking runners on a breathtaking tour of the La Sal Mountains, Utah's second highest mountain range. The 100 […]
Emerald Mountain Epic
The Emerald Mountain Epic presented by Hard Headed attracts some of the nation's best mountain bike and trail running racers, while still offering incredible opportunities for athletes of all skill […]
Reece’s Roundup 5K/10K
Join the Rubino Family at Philip S Miller Park in Castle Rock for the Annual Reece’s Roundup 5K/10K. This event supports Reece Rubino in his fight against Spinal Muscular Atrophy.
All-Out Runapalozza
As those summer mornings are just beginning to cool, join us for a celebration to end the season and our 11th Annual Runapalooza! From the award winning Apex Center, these […]
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