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  • Calarat Challenge Trail Running Festival

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    Join us Labor Day weekend for the Calarat Challenge Trail Running Festival. We start the festivities off on Saturday night with a 5K that you can run, walk or hike, …

  • Snow Mountain Ranch Festival

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    YMCA of the Rockies Granby (Nordic Center) 1101 County Rd 53, Granby, United States

    The YMCA of the Rockies in Granby hosts the 12th annual Snow Mountain Ranch Trail Running Festival. Races will include a 50K. 33K, Half Marathon,10K, and 5K. You can also …

  • Bergen Peak 5K and Half Marathon

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    Bergen Peak runners will experience the rolling hills of Elk Meadow and the strenuous switchbacks of Too Long Trail. While ascending more then 1,300 feet, runners will peak at a …

  • Highlands Ranch Back Country Wilderness Half Marathon

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    2025 marks the 17th Annual Backcountry Wilderness Half Marathon in Highlands Ranch! This highly-anticipated event invites participants to embark on a 13.1-mile trail race through captivating landscapes, encompassing both the …

  • Mountain Ridge Trail Race

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    Mountain Ridge Middle School 10590 Mountain Vista Ridge, Highlands Ranch, CO, United States

    Mountain Ridge takes place near Highlands Ranch primarily on the Douglas County East-West Regional Trail. This gently rolling course will keep the Heart Rate pumping while offering some of the …

  • Greenland Trail Races

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    The Greenland Trail Races offer 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 …

  • Mother’s Day Run

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    Louisville Community Park 955 Bella Vista Dr, Louisville, CO, United States

    The Louisville Trails near old town host the Mothers Day Run in 2026.  This run is all about Fun, Music, Gifts and sharing time with the family! For complete information, …

  • The Pasta Run

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    Louisville Community Park 955 Bella Vista Dr, Louisville, CO, United States

    The 5k, 10k and Half Marathon TRAIL RUN is set for Saturday May 30th….and limited to just 450 Runners on the trails. A fast and flat course…through the trails and …

  • DU Dash

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    Palmer Lake

    Experience the awe-inspiring beauty of Colorado's Palmer Lake area on the Santa Fe Trail for the in-person DU Dash. Runners will traverse the trail framed by the Rocky Mountains, connecting …

  • Barr Lake Trail Race

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    Barr Lake State Park (Nature Center) 13401 Picadily Rd, Brighton, CO, United States

    The Barr Lake Trail Race returns to Brighton, CO, offering beautiful lake views and a prime opportunity for new PRs. This event features a flat and fast course, with less …