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

  • RexRun 5K for PAWSitivity

    Arapahoe County Fairgrouds 25690 E Quincy Ave, Aurora, CO, United States

    The RexRun 5K is a 5K run/walk to spread mental health awareness and #PAWSitivity in schools with the help of more Therapy K-9's like Arapahoe County Sheriff's Office K-9 Rex. This year's event is at Dove Valley Park in Centennial on August 6th.

    $30 – $60

  • Boulder Sunset 5K/10K

    Boulder Reservoir 5565 N 51st St, Boulder, CO, United States

    The Boulder Sunset 10K & 5K Run is part of BBSC’s biggest endurance event of the summer. Spend your weekend racing with BBSC at the incredible and scenic Boulder Reservoir. Register, […]

  • Thirsty 13 Half Marahton

    Ska Brewing Durango, CO, United States

    It's a race.  It's a Brewfest.  It's the Thirsty 13 Half Marathon! Are you thirsty for gorgeous scenery?  You won't find a course more beautiful than this one.  With the […]

  • Ouray 50 Mile

    Fellin Park 1001 US-550, Ouray, CO, United States

    A 50 That's More Difficult Than Your Last 100 How do you build a 50 miler that hits harder than most 100 milers? Easy. Start with a stout mountain hundred […]

  • Wine Run 5K

    The Winery At Holy Cross Abbey 3011 US-50, Canon City, CO

    Join us on Sunday, August 30, 2026 for an exciting annual event that features the amazing scenery and landscape of The Winery At Holy Cross Abbey! Due to the huge […]

    $35

  • Lakewood Trail Running Series I

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

    The popular trail running series in Bear Creek Lake Park takes place weekly in September. Different routes allow participants to explore all areas of the park. Racers can compete against […]

    $55 – $70

  • Front Range Ultra Dayze

    Centennial Park - Loveland 977 W 1st St, Loveland, CO, United States

    Welcome to Front Range Ultra Dayze! 100 hours of ultra-running madness! Our goal is to bring people from all over the U.S. together for a festival of ultra-running in Loveland, […]

  • Grand Traverse Mountain Run

    Mt. Crested Butte Mt. Crested Butte Ski Resort, Crested Butte, CO, United States

    The Grand Traverse Mountain Run is a point-to-point ultra marathon from Crested Butte to Aspen, Colorado. The course follows the route of the Grand Traverse Backcountry Ski race. In total, […]

  • Golden Harvest Half Marathon

    Westminster Promenade 10600 Westminster Blvd, Westminster, CO, United States

    5k/10k/Half Marathon registration includes a custom bib, designer shirt, and a custom finisher medal! 1 Mile registration is untimed and includes a custom bib, designer shirt, and a custom finisher […]

  • Creede Mountain Run

    Creede Historical Society Museum & Library 15 S Main St, Creede, CO, United States

    The Race Is On! The Creede Mountain Run, established in 1987, celebrates the end of summer and the beginning of fall in our small historic mountain town. This event offers […]

    • 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: 223