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  • Run Rabbit Run Ultra

    Steamboat Springs Ski Resort 2305 Mt Werner Cir, Steamboat Springs, CO, United States

    The Run Rabbit Run courses are very much like life, in that there are many, many little and not so little ups and downs in between the obvious highs and […]

  • Oktoberfest Triathlon

    Union Reservoir 461 County Road 26, Longmont, CO, United States

    The annual Oktoberfest Triathlon on Saturday September 24th, 2022,  is the party of the season and also a 2022 Mountain Collegiate Conference Race!  As the leaves change color this race […]

  • Sangre de Cristo Ultras

    Music Meadows Ranch 6076 Co Rd 119, Westcliffe, CO, United States

    Come join us on the Rainbow Trail in the Sangre de Cristo mountains. Run beneath the watchful eye of these gorgeous, and ominous, mountains. This race is full of festivities, […]

  • Highlands Ranch Race Series

    HRCA Oktoberfest 5K

    Highlands Ranch Town Center 9352 Dorchester St., Highlands Ranch, CO, United States

    Put on your lederhosen and sneakers as we kick-start the annual Highlands Ranch Community Association's Oktoberfest event in Town Center with the Oktoberfest 5K! This course is a mixture of […]

  • Bear Chase Trail Race

    Bear Creek Lake Park 15600 W Morrison Rd, Lakewood, CO, United States

    The Bear Chase Race Endurance Festival is a 100K, 50 Mile, 50K, Half Marathon, Baby Bear 10K and 5K trail race at beautiful Bear Creek Lake Park, in Lakewood, CO. […]

  • Featured

    Colorado Springs Marathon

    Pioneers Museum 215 South Tejon Street, Colorado Springs, CO, United States

    Join us for the 13th Annual Colorado Springs Marathon on Saturday, October 3, 2026! Whether you're a seasoned runner or taking on your first 5K, we have four exciting race […]

    $8

  • Taco Bell 50K

    Taco Bell 447 S Broadway, Denver, CO, United States

    It has been described as Urban Legend. More mysterious and barking spiders than the Barkley Marathons. The International Taco Bell 50k boasts a higher DNF rate than the famed Leadville […]

  • PPRR Nielson Challenge

    PPRR Nielson Challenge

    North Monument Valley Park 1794 Culebra Ave., Colorado Springs, CO, United States

    Race Format The first time you run this event, you'll establish a base time for yourself. This base time is used to generate a handicap time. The handicap time is […]

  • Emerald Mountain Trail Run

    Howelson Hill Steamboat Springs, CO, United States

    This races offers two distances on Emerald Mountain, 12k (ends up being closer to 7.75 miles long) and a 4 mile run. This scenic course will begin at the base […]

  • RMRR Trophy Series

    RMRR 8M and 5K

    Star K Ranch 16002 E Smith Road, Aurora, CO, United States

    Everyone – slow, fast, or in-between –  can win  at RMRR Trophy Series races.  With our handicap scoring system, we predict YOUR finish time based on recent running results, giving you a great […]

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    We do not allow events without physical locations (IE – virtual runs, runs with locations TBD, etc…).
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