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

  • Highline Canal Summer Scamper

    Bible Park 6802 E Yale Ave, Denver, CO, United States

    The fourth annual High Line Canal Summer Scamper, 5K for All, will take place on the evening of June 24 at Bible Park in Denver. Before the 5K enjoy a […]

    $30 – $45

  • Boulder Stroke & Stride IV

    Boulder Stroke & Stride
    Boulder Reservoir 5565 N 51st St, Boulder, CO, United States

    The Boulder Stroke & Stride offers Boulder area athletes a fun 1-lap 750 Meter Swim, or 2-Lap 1500 Meter swim in Boulder Reservoir, followed by a 5k run on the […]

  • Race in the Clouds Dirt Festival

    Buckskin Cemetery 227 Buckskin Street, Alma, CO, United States

    Get ready for a weekend of epic outdoor adventure at 10,600 feet in beautiful Alma, Colorado—the highest incorporated town in North America! Whether you love mountain biking, trail running, off-road […]

  • The John Cappis

    Silverton 414 Greene Street, Silverton, CO, United States

    What A free mountaineering jaunt originated by James Varner in honor of the legendary John Cappis, one of the founders of the Hardrock 100. The course gets tweaked from year […]

  • Timberview Trail Run

    Lory State Park 708 Lodgepole Dr, Bellvue, CO, United States

    Crisp morning air and a summer sunrise in Colorado. YES PLEASE! Join us on the foothills at Lory State Park for a fun & beautiful morning trail race. This run […]

    $20 – $50

  • Alderfer / 3 Sisters 5K/10K

    Evergreen Trail Race Series
    Alderfer Ranch Pavilion 31677 Buffalo Park Rd, Evergreen, CO, United States

    Come run with us in beautiful Evergreen at Alderfer/3 Sisters Park! This race day will offer a both 5k and a 10k race coursing through this amazing park. Play fun […]

  • Lake to Lake Triathlon

    Loveland High School 920 West 29th St., Loveland, CO, United States

    Loveland Lake to Lake Triathlon has welcomed athletes from Northern Colorado, this entire state, region, country,  and outside the USA for 24 years and we are excited about our 2025 […]

  • Slacker Half Marathon

    Strousse Park - Georgetown 6th & Rose St, Georgetown, CO, United States

    Seize the chance to earn your bragging rights as a true Slacker! Embark on this exhilarating journey starting at the base of Loveland Ski Area, perched at an impressive elevation […]

  • Pride 5K

    Cheesman Park 1601 Race St., Denver, CO, United States

    The Denver Pride 5K is more than just a race—it's a powerful way for supporters of The Center on Colfax to make a difference in the lives of Colorado’s LGBTQ+ […]

    • 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: 4