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  • Winterfest 5K

    Carpenter Park 3498 E 112th Ave, Thornton, CO, United States

    Kick off the holiday season with a spirited run/walk at Thornton's Carpenter Park. Choose from the chip-timed 5k, or experience the festive atmosphere in a shorter distance in our untimed […]

  • YMCA Jingle Jog

    Fountain-Fort Carson High School 900 Jimmy Camp Road, Fountain, CO, United States

    Get ready for the Annual Jingle Jog 5K and Kids' Reindeer Romp as we take on the fun and festive course at the Fountain Creek Regional Park! We are excited […]

  • Ugly Sweater Fun Run

    Vail Village 292 E Meadow Dr, Vail, CO, United States

    Grab your best and ugliest holiday sweater and join the Vail Recreation District for a fun-filled morning run through Vail Village on December 11th.

    $7

  • Jingle Bell Run

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

    Get ready for this year’s Jingle Bell Run, the original festive race for charity brought to you by the Arthritis Foundation. Wear your favorite holiday gear, and let's jingle all […]

  • Candy Cane Chase

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

    Now in it's 5th Year...we will have 2 now courses at the Creek Oath and Westminster Park is finished! We get the same families coming back year after year, Celebrating […]

    $35.00

  • Santa’s Dash for Ca$h

    Sloan's Lake Park 1700 Utica Street, Denver, CO, United States

    Join 3W Races on December 18th at Sloan's Lake Park. Collect your prize envelope at the finish line for gift cards from local businesses and maybe even CA$H!

  • Resolution Run 5K

    Edora Pool Ice Center 1801 Riverside Dr, Fort Collins, CO, United States

    Run out the old year, and welcome the new! Now in its 42nd year, the Resolution Run is a family-friendly, neighborhood streets 5K starting & finishing at the Edora Pool […]

    $25 – $35

  • Rescue Run

    Norris Penrose Event Center 1045 Lower Gold Camp Rd, Colorado Springs, CO, United States

    Welcome back to Norris-Penrose Events Center / Bear Creek Park! Back in the beginning... The Rescue Run Start/Finish was at Norris-Penrose Events Center - After many wonderful years at Palmer […]

  • Resolute Runner 5K

    Memorial Park - Arvada 8001 West 59th Ave, Arvada, CO, United States

    The Resolute Runner 5K is the KICK OFF PARTY OF THE YEAR! It's time to be RESOLUTE, to retroactively earn your pumpkin pie and chocolate truffles, and to start the […]

  • Hot Chocolate 5K

    Pueblo YMCA 3200 E. Spaulding Ave, Pueblo, CO, United States

    Warm up your taste buds because you’re invited to the very first Hot Chocolate 5k Run! Come run your personal record and enjoy some post-race treats. This race is the […]

  • Polar Bear 5K

    Featured RunDenver Race Series
    Washington Park - Denver 701 S Franklin St, Denver, CO, United States

    You run faster when it's cold, right? Come Run for the 🥶Chill of it...all the "cool" runners are doing it! RACE HIGHLIGHTS 🛍️Participants get some super fantastic running socks! 📸FREE […]

  • Chilly Cheeks Winter Duathlon

    Chilly Cheeks Winter Duathlon Series
    Cherry Creek State Park 4201 S Parker Rd, Aurora, CO, United States

    The Chilly Cheeks Duathlon Series is now a stand-alone event held in late February. The 63rd Chilly Cheeks Duathlon will be held in the traditional format of Run-Bike-Run. Both runs […]

  • Three Creeks Half Marathon

    Cherry Creek State Park 4201 S Parker Rd, Aurora, CO, United States

    Racing Underground brings you an amazing half marathon this spring! The Three Creeks Half Marathon features a half marathon course that is flat, fast and scenic! Travel on foot through […]

  • Platte River Half Marathon

    Reynolds Landing 6745 S. Santa Fe Drive, Littleton, CO, United States

    Denver's oldest half marathon runs along the Platte River Trail, covering parts of Littleton and Denver.

  • Rattler Trail Race

    Palmer Park 3343 Paseo Rd, Colorado Springs, CO, United States

    Rattler was created to feature one of Colorado Springs' best city parks, Palmer Park.  Runners will enjoy views of the city and Pikes Peak from the sandstone bluffs, while running […]

  • 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!

  • Colorado Marathon

    Washington Park - Fort Collins 301 Maple St, Fort Collins, CO, United States

    Marathon, Half Marathon, 10k, 5k and 3-Person Marathon Relay.  Marathon, Marathon Relay and Half Marathon runners get to run down the scenic, downhill Poudre Canyon to the finish in Old […]

  • Wine Run 5K

    Colterris Winery 3907 N River Rd, Palisade, CO, United States

    Like Running or Walking? Love Wine? This race is for you! Join us on Saturday, May 8, 2027 at 9:30am and 11:00am (you will pick your start time during registration) […]

    $35

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