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

Events Search and Views Navigation

Event Views Navigation

Filters

Changing any of the form inputs will cause the list of events to refresh with the filtered results.

Today

  • Snow Mountain Ranch Trail Festival

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

    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, CO, United States

    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, CO, United States

    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, CO, United States

    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, CO, United States

    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, CO, United States

    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, CO, United States

    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, CO, United States

    Embark on your journey by winding through Old Town Nederland, the epitome of Colorado mountain towns. The Half Marathon, 10K and 5K will take you on dirt roads and single […]

  • Trail Sisters Half Marathon

    Whitewater Park 913 E Main St, Buena Vista, CO, United States

    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 […]

    • Please click here to submit your event for FREE to our online calendar.
    We do not allow events without physical locations (IE – virtual runs, runs with locations TBD, etc…).
    Please allow 48 hours after submission for an event to appear on the calendar. If you have already listed your event and would like us to update it, please contact us.

    Views: 10