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  • Joy & Justice 5K

    Timnath Reservoir 5824 County Rd 40, Timnath, CO, United States

    Join us for the Race for Joy & Justice 5K, a family-friendly run/walk event benefiting the Joy & Justice organization based in Timnath, Colorado. This exciting event brings together people […]

  • Boulder Skyline Traverse

    Runners Roost - Boulder 629 S Broadway, Boulder, CO, United States

    The Boulder Skyline Traverse is a ~18 mile trail route that covers the 5 peaks of Boulder (South Boulder Peak, Bear Peak, Green Mountain, Flagstaff Mountain, and Mt. Sanitas). You'll […]

  • Blue Sky Trail Marathon

    Blue Sky Trailhead County Road 38e, Fort Collins, CO, United States

    Taking place on the trails between Horsetooth Mountain Park and the Devil’s Backbone Open Space, the Blue Sky courses take you on a north-south tour of the easternmost hogbacks of […]

    $90 – $130

  • Cowboy Half Marathon

    Mancos Public Library 211 W. 1st, Mancos, CO, United States

    With a new race date for 2021, the Mancos Cowboy Half Marathon and 5k is a beautiful and scenic course with a mix of pavement, dirt road, and trail.  Grab […]

  • CSU Homecoming 5K

    CSU Oval Fort Collins, CO, United States

    The Homecoming Race will take place on the Oval for our traditional course. All ages and abilities are welcome. Proceeds from the Homecoming Race benefit the ongoing research efforts and […]

  • Crazy Cloverleaf

    Chatfield State Park 11500 N Roxborough Park Road, Littleton, CO, United States

    We host one race per month from November to March.  All races are at Chatfield State Park and start at 9:00 am on Saturday mornings.  Check-in starts at 8:15 am.

  • Run Fur Fun Spooktacular 5K

    Odell Brewing Company 800 East Lincoln Avenue, Fort Collins, CO, United States

    Our Run Fur Fun 5k starts and ends at Odell Brewing Company in Fort Collins. Don't forget to wear a costume for the costume contest, enjoy the eclectic tunes of The Sugar […]

  • Canceled Run With The Panthers 8K

    Nederland High School 597 Co Hwy 130, Nederland, CO, United States

    Come join us at 8,410' for a fun and fast 8,410meter road race! This is a fun and welcoming local race benefiting the Nederland Middle/Senior High School PTA. This is […]

  • Hoofin’ It Through the Hollows 5K

    South Suburban Race Series
    deKoevend Park 6315 S. University Blvd., Centennial, CO, United States

    Runners of all ages and abilities, families, and dogs are all welcome to join us for this Halloween celebration!  Dress in your Halloween best for a chance to win prizes at the […]

  • Expo Park XC Runs

    Expo Park 10955 E Exposition Ave, Aurora, CO, United States

    Old-school cross-country style courses with creek crossings and bale jumps. Youth races 1k - 4k. All-ages 5k. Individuals and teams.

    $20

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