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    Colorado race calendar

    24 races match

    Other

    Cirque Series - Arapahoe Basin, CO

    Sat, Sep 5, 2026
    Keystone, Colorado
    trail
    Rolling
    30PR40value40vibe
    Register
    Other

    South Fork Alder Ass Race

    Sat, Sep 5, 2026
    South Fork, Colorado
    road
    Rolling
    60PR40value40vibe
    Register
    5K

    Golden Harvest Half Marathon & 5k/10k - Denver

    Sat, Sep 5, 2026
    Denver, Colorado
    road
    Rolling
    65PR40value45vibe
    Register
    5K

    Golden Harvest Half Marathon & 5k/10k - Colorado Springs

    Sun, Sep 6, 2026
    Colorado Springs, Colorado
    road
    Rolling
    65PR40value45vibe
    Register
    10K

    10k at 10,000 Feet

    Sun, Sep 6, 2026
    Steamboat Springs, Colorado
    road
    Rolling
    65PR40value45vibe
    Register
    Half Marathon

    Labor Day Half Marathon

    Mon, Sep 7, 2026
    Parker, Colorado
    road
    Rolling
    60PR40value45vibe
    Register
    5K

    Oak Creek No Fun Run

    Mon, Sep 7, 2026
    Oak Creek, Colorado
    road
    Rolling
    65PR50value75vibe
    scenic
    charity
    Register
    Other

    Flaming Foliage Relay - Idaho Springs to Buena Vista

    Fri, Sep 11, 2026
    Idaho Springs, Colorado
    road
    Rolling
    60PR40value40vibe
    Register
    Half Marathon

    Trail Sisters Women's Half Marathon & 10k

    Sat, Sep 12, 2026
    Buena Vista, Colorado
    trail
    Rolling
    30PR40value55vibe
    scenic
    Register
    5K

    Spirit of the Valley 5k

    Sat, Sep 12, 2026
    Grand Junction, Colorado
    road
    Rolling
    65PR50value65vibe
    charity
    Register
    5K

    Break Your Neck: Walk, Run, or Roll

    Sat, Sep 12, 2026
    Pueblo, Colorado
    road
    Rolling
    65PR40value45vibe
    Register
    Half Marathon

    Black Squirrel Half Marathon

    Sat, Sep 12, 2026
    Bellvue, Colorado
    road
    Rolling
    60PR40value55vibe
    scenic
    Register
    Other

    2026 Lake Nighthorse Triathlon - Sprint and Olympic

    Sat, Sep 12, 2026
    Durango, Colorado
    road
    Rolling
    60PR40value50vibe
    scenic
    Register
    5K

    The Denver 5k

    Sat, Sep 12, 2026
    Denver, Colorado
    road
    Rolling
    65PR40value55vibe
    scenic
    Register
    Other

    53rd Annual Imogene Pass Run

    Sat, Sep 12, 2026
    Telluride, Colorado
    trail
    Rolling
    30PR40value40vibe
    Register
    5K

    National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORA

    Sat, Sep 12, 2026
    Centennial, Colorado
    road
    Rolling
    65PR40value45vibe
    Register
    5K

    For The City Network 5K

    Sat, Sep 12, 2026
    Greeley, Colorado
    road
    Rolling
    65PR40value45vibe
    Register
    5K

    Run for Mental Health 5K/10K/13.1 DENVER/AURORA

    Sat, Sep 12, 2026
    Centennial, Colorado
    road
    Rolling
    65PR40value45vibe
    Register
    10K

    RMRR September Trophy Series

    Sun, Sep 13, 2026
    Thornton, Colorado
    road
    Rolling
    65PR40value55vibe
    scenic
    Register
    5K

    Tiger Prowl 5K

    Sun, Sep 13, 2026
    Denver, Colorado
    road
    Rolling
    65PR50value65vibe
    charity
    Register
    Other

    Buffalo Bicycle Classic

    Sun, Sep 13, 2026
    Boulder, Colorado
    road
    Rolling
    60PR40value50vibe
    scenic
    Register
    5K

    Severance Glow 5K Run or Walk

    Fri, Sep 18, 2026
    Severance, Colorado
    road
    Rolling
    65PR40value55vibe
    beer
    Register
    Half Marathon

    Autumn Run

    Sat, Sep 19, 2026
    Buena Vista, Colorado
    road
    Rolling
    60PR40value40vibe
    Register
    5K

    Miles 4 Madison 5K & 1K

    Sat, Sep 19, 2026
    Littleton, Colorado
    road
    Rolling
    65PR40value45vibe
    Register
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