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  • Unicorn 5K

    Great Lawn Park 101 Yosemite St, Denver, CO, United States

    Ready to gallop around Denver with some friends? Yeah, you are! Come frolic with us at the Unicorn Runner 5k at Great Lawn Park to kick off your spring running […]

  • Flying Pig 5K

    Spring Canyon Park 3156 S Overland Trail, Fort Collins, CO, United States

    JOIN US FOR THE 17TH ANNUAL FLYING PIG 5K The Flying Pig 5K is a fundraiser that will benefit children’s programs at Foothills Gateway, including the Family Support Services Program […]

  • Dash and Dine 5K #1

    Dash and Dine 5K
    Boulder Reservoir 5565 N 51st St, Boulder, CO, United States

    The Dash & Dine 5k run, Boulder’s favorite spring tune-up run series is back for 4 races in May at the beautiful Boulder Reservoir in Boulder, CO.

  • Take 5 in the Garden of the Gods

    Garden of the Gods Park 1805 N 30th St, Colorado Springs, CO, United States

    Who can turn down a morning in Garden of the Gods? We'll close the park to traffic, so runners can enjoy their race, traffic free! Choose between a 5k or […]

  • Greenland Trail Race

    Featured
    Greenland Open Space 1532 E Noe Rd, Larkspur, CO, United States

    The Greenland Trail Race offers four outstanding distances in southern Douglas County. Run the 4 Miler, the 8 Miler, the 25K, or tackle the 50K ultramarathon, Colorado’s fastest 50K! With Pikes Peak as your backdrop, you’ll cruise over a soft dirt trail on your way to a new personal best. With chip timing, an innovative technical running shirt in men’s and women’s sizing, food and beer at the finish, this race will make you want to come back for more!

  • Collegiate Peaks Trial Run

    Buena Vista Community Center 715 E Main St, Buena Vista, CO, United States

    The Collegiate Peaks Trail Run takes place in Buena Vista, Colorado and offers two race distance options - 25 miles and 50 miles. The race was established in 1991 and […]

  • Niwot’s Challenge

    Sedalia Post Office 4195 Douglas Ave, Sedalia, CO, United States

    Niwot’s Challenge is a very difficult, grass-roots, ultramarathon in Colorado’s Front Range. It is modeled after the arduous Barkley Marathons in Tennessee, and the historic More and More Difficult 50K […]

  • Duck Waddle 5K

    Lake Estes Marina 1770 Big Thompson Drive, Estes Park, CO, United States

    The DUCK WADDLE 5K race begins at east side of Estes Park Parking Structure. Each runner and walker will follow the scenic Lake Estes Trail counterclockwise to the finish line (west of […]

    $30 – $40

  • Hope House 5K

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

    Our 13 annual Hope House 5K & Fun Run will take place on Saturday, May 2, 2026 at the Promenade Terrace Park (South of the Westin Westminster)! It will be a […]

  • Furry Scurry

    Washington Park - Denver 701 S Franklin St, Denver, CO, United States

    The Furry Scurry is an annual, fun-filled festival and two-mile dog walk at Denver’s Washington Park to benefit the animals at the Dumb Friends League.  No matter where you scurry, every step you […]

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