Event details subject to change. Please confirm all information via event website.

All Day

Flaming Foliage Relay

Citizens Park 17th Ave & Miner St, Idaho Springs

Flaming Foliage is a 165 mile overnight team relay race adventure with single track trails, from Idaho Springs to beautiful Buena Vista, over Guanella, Georgia & Fremont Passes. Since 2013, […]

Snow Mountain Ranch Trail Festival

YMCA of the Rockies - Snow Mountain Ranch 1101 County Rd #53, Granby

Join us at the YMCA of the Rockies in Granby for the annual Snow Mountain Ranch Trail Running Festival. This event features 4 races with 2 different "challenges".  Races will […]

Littlefoot Sprint Triathlon

Bear Creek Lake Park 15600 W Morrison Rd, Lakewood

Enjoy a fun late season tri at beautiful Bear Creek Lake Park in a land before time. Set at the base of the foothills, the Littlefoot Triathlon starts off with […]

Black Squirrel Half Marathon

Lory State Park 708 Lodgepole Dr, Bellvue

The Black Squirrel Trail Half Marathon takes place on the wonderful trails of Lory State Park to the northwest of Fort Collins, CO. The trail half marathon course offers a […]

$90 – $125

Devil on the Divide 50K/22K

Minton Park Cemetery Rd, Empire

We are pleased to present one of the most beautiful and challenging trail racing events in the state of Colorado with breathtaking (literally and figuratively) views of Clear Creek County […]

Lake Nighthorse Triathlon

Lake Nighthorse 1795 CR 210, Durango

Scenic and hilly Sprint and Olympic(standard) distance triathlons held at Lake Nighthorse Recreation Area in Durango 9/6/25 with prize money for top 3 overall male and female racers.

CMRA South Seven

Bluffs Regional Park 10099 Crooked Stick Pl, Lone Tree

The course will be on wide, crushed gravel paths and, depending on the status of construction in the nearby neighborhood, potentially a little bit of single track. It's a hilly, […]

Gleneagle Spirit 5K

Antelope Trails Elementary 15280 Jessie Dr., Colorado Springs

The 2025 Gleneagle Spirit 5k is the Fourth annual event held in the Gleneagle community. The event features a 5k Run/Walk for Fun that winds through the streets of the […]

Ned*Ned Half Marathon

TEENS Inc. 151 East Street, Nederland

Embark on your journey by winding through Old Town Nederland, the epitome of Colorado mountain towns. The Half Marathon will take you on dirt roads and single track trails as […]

Team Hope 5K

Stapleton Central Park 8801 Martin Luther King Jr Blvd, Denver

The Rocky Mountain Chapter of the Huntington’s Disease Society of America (HDSA) will host the annual Heroes and Villains Team Hope Walk and 5K Run at Stapleton Central Park. Wear […]

Trail Sisters Half Marathon

Whitewater Park 913 E Main St, Buena Vista

Come run a Half Marathon or our new 10k that twist and turn through sage brush and ponderosa pines, all while providing stunning views of the Collegiate Peaks. Located in […]

Imogene Pass Run

Ouray Ouray

The Imogene Pass Run (IPR) is a 17.1 mile point-to-point mountain race within the western San Juan mountains of Colorado. The course runs along a route which connects the towns […]

$60

The Denver 5K

Sloan's Lake Park 1700 Utica Street, Denver

THE Denver 5k! Denver's Iconic Sloan Lake is the setting for the return of 'THE Denver 5k'. Celebrate with friends and family as you race around the lake in the […]

Spirit of the Valley Run

St. Matthew's Episcopal Church 3888 27 1/2 Road, Grand Junction

Helping to Heal! The Spirit of the Valley Run, Walk 'N Roll 1K and 5K timed races are set for Saturday September 9, 2023. Runners, walkers and rollers are all […]

Break Your Neck 5K

CSU Pueblo 2200 Bonforte Blvd, Pueblo

Come join us to celebrate the access/disability community and raise money for spinal cord injury rehabilitation and awareness. My name is Kenny White III. On November 15 of last year, […]

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