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  • Pioneer Prairie Dog Half Marathon

    Prairie Dog Race Series
    Westminster Promenade 10600 Westminster Blvd, Westminster, CO, United States

    Welcome to the Pioneer Prairie Dog Half Marathon event; the one that started the series! With 10k and 5k events too! Everyone is back to school and slipping into a […]

  • Log Hill Hustle​ 5K/10K

    Divide Ranch and Club 151 Divide Ranch Cr, Ridgway, CO, United States

    Join us for the Annual Log Hill Hustle 5K & 10K, a scenic fun run/walk hosted by Fortuna Tierra Club in support of local education. Set against the stunning backdrop […]

  • Wellington Swim-Run Challenge

    Wellington Lake Wellington Lake Rd. Pike National Forest, Bailey, CO, United States

    Swimmers may choose to swim with their shoes, paddles, a wetsuit, pull buoy, floaties, rubber duckies, inflatable flamingoes or any other nonmotorized swim aid in this event. Race Course Per […]

  • Rebel Run 5K

    Stapleton Central Park 8801 Martin Luther King Jr Blvd, Denver, CO, United States

    Join Conservation Colorado for the first-ever Rebel Run 5k! Run, walk or stroll to show your passion for Colorado's climate, air, land, water and communities. Create or join a team, […]

  • Rock Hawk Trail Race

    Phillip S. Miller Park 1375 West Plum Creek Pkwy, Castle Rock, CO, United States

    Held on the gorgeous, thrilling and rolling trails of Castle Rock’s Miller Park & Ridgeline Trail systems. While not overly technical, these trails will challenge and excite, as you soak […]

  • Boulder Sunset Triathlon

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

    Summer may be coming to an end, but our tri season is still heating up! Join us at the Boulder Reservoir for the 13th Annual Boulder Sunset Triathlon, a local […]

  • 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, […]

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