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    Ultra Races in Colorado

    26 upcoming Ultra races across Colorado. Run This events are listed first — pick a city below to narrow it down.

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    26 races

    Wed, Sep 23, 2026

    CG Adventure Club - Elevation Everest

    Winter Park, CO

    Outside22.0 mi42.0 mi

    Fri, Sep 25, 2026

    Red Feather Trail Jamboree

    Red Feather Lakes, CO

    Outside50.0 mi31.1 miMarathon94.0 mi

    Sat, Sep 26, 2026

    West Line Winder

    Buena Vista, CO

    Outside31.1 mi18.6 mi

    Sat, Sep 26, 2026

    Mountains to the Desert Classic

    Telluride, CO

    Outside103.0 mi73.0 mi110.0 mi

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    Sat, Sep 26, 2026

    Crested Butte Ultra

    Crested Butte, CO

    Outside50.0 mi34.2 mi21.7 mi

    Sat, Sep 26, 2026

    Estes Epic

    Estes Park, CO

    Outside31.0 mi15.0 mi62.0 mi

    Sat, Sep 26, 2026

    Sangre de Cristo Trail Festival

    Westcliffe, CO

    Outside8.0 mi16.8 mi31.1 mi50.0 mi

    Sun, Sep 27, 2026

    Sawatch Ascent

    Nathrop, CO

    Outside31.1 mi

    Fri, Oct 2, 2026

    Water For People World Water Classic

    Anywhere, CO

    Outside3.7 mi37.3 mi

    Sat, Oct 10, 2026

    Suffer Better 10th Annual Fall Trail Runs

    Pine, CO

    Outside31.1 mi15.5 mi5K

    Sat, Oct 17, 2026

    Indian Creek Trail Runs

    Sedalia, CO

    Outside5.5 mi15.0 mi35.0 mi54.0 mi

    Sat, Nov 7, 2026

    Kessel Run Ultra

    Fruita, CO

    Outside50.0 mi40.0 mi20.0 mi10.0 mi

    Sat, Nov 7, 2026

    The Unselfish Ultra

    Golden, CO

    Outside30.3 mi

    Sat, Dec 5, 2026

    Sawmill Trail Runs

    Pine, CO

    Outside8.1 mi16.1 mi31.7 mi

    Sun, Apr 11, 2027

    NoCo Urban Ultra & Relay

    Bellvue, CO

    Outside50.0 mi100.0 mi

    Sat, May 1, 2027

    Greenland Trail Races

    Larkspur, CO

    Outside31.1 mi15.5 mi8.0 mi4.0 mi

    Sat, May 22, 2027

    Samson's Revenge

    Estes Park, CO

    Outside6.5 mi15.5 mi31.1 mi

    Sat, Jun 5, 2027

    Weld Your Mettle Running Festival

    Eaton, CO

    Outside50.0 mi62.1 mi4.3 mi14.0 mi

    Sat, Jun 12, 2027

    KowTown Gravel

    Kremmling, CO

    Outside88.0 mi54.0 mi28.0 mi16.0 mi

    Sat, Jun 12, 2027

    Summits Trail Runs

    Granby, CO

    Outside6.1 mi13.9 mi27.8 mi33.9 mi

    Fri, Jun 25, 2027

    Race in the Clouds - Alma Dirt Festival 2027

    Alma, CO

    Outside38.0 mi26.0 miMarathon22.0 mi

    Fri, Jul 9, 2027

    Silverheels Trail Runs

    Como, CO

    Outside10.8 mi19.1 mi38.3 mi53.8 mi

    Fri, Aug 6, 2027

    Wild West Relay

    Fort Collins, CO

    Outside200.0 mi

    Sat, Aug 7, 2027

    Sheep Mountain Trail Runs

    Fairplay, CO

    Outside14.2 mi33.0 mi53.1 mi

    Sat, Sep 11, 2027

    2027 Lake Nighthorse Triathlon - Sprint and Olympic

    Durango, CO

    Outside16.0 mi32.0 mi

    Sat, Sep 11, 2027

    Rampart Rager Gravel

    Colorado Springs, CO

    Outside32.0 mi44.0 mi62.0 mi11.5 mi

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