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  • Ouray 50 Mile

    Fellin Park 1001 US-550, Ouray, CO, United States

    A 50 That's More Difficult Than Your Last 100 How do you build a 50 miler that hits harder than most 100 milers? Easy. Start with a stout mountain hundred […]

  • Glow and Roll 5K

    Clement Park 7306 W. Bowles Avenue, Littleton, CO, United States

    Glow & Roll is an inclusive, dusk-time 5K Walk/Run/Roll (with a 1.6-mile option). A glow-filled, twilight experience with lights, music and day-glow swag that transforms the event into a celebration […]

  • Wine Run 5K

    The Winery At Holy Cross Abbey 3011 US-50, Canon City, CO

    Join us on Sunday, August 30, 2026 for an exciting annual event that features the amazing scenery and landscape of The Winery At Holy Cross Abbey! Due to the huge […]

    $35

  • Front Range Ultra Dayze

    Centennial Park - Loveland 977 W 1st St, Loveland, CO, United States

    Welcome to Front Range Ultra Dayze! 100 hours of ultra-running madness! Our goal is to bring people from all over the U.S. together for a festival of ultra-running in Loveland, […]

  • Grand Traverse Mountain Run

    Mt. Crested Butte Mt. Crested Butte Ski Resort, Crested Butte, CO, United States

    The Grand Traverse Mountain Run is a point-to-point ultra marathon from Crested Butte to Aspen, Colorado. The course follows the route of the Grand Traverse Backcountry Ski race. In total, […]

  • Golden Harvest Half Marathon

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

    5k/10k/Half Marathon registration includes a custom bib, designer shirt, and a custom finisher medal! 1 Mile registration is untimed and includes a custom bib, designer shirt, and a custom finisher […]

  • Creede Mountain Run

    Creede Historical Society Museum & Library 15 S Main St, Creede, CO, United States

    The Race Is On! The Creede Mountain Run, established in 1987, celebrates the end of summer and the beginning of fall in our small historic mountain town. This event offers […]

  • Cirque Series 14K

    Arapahoe Basin Ski Resort 28194 US-6, Keystone, CO, United States

    The race begins at 10,780' ft, starting at the base of Arapahoe Basin, Mountain Goat Plaza, head up to the High Noon parking lot, then to last chance.  You will […]

  • Denver Broncos Fit 7K

    Empower Field at Mile High 1701 Bryant St., Denver, CO, United States

    All members of Broncos Country, walkers and runners alike, are invited to join the Denver Broncos for the 13th annual Broncos 7K presented by CommonSpirit, Ticketmaster, King Soopers, and Cigna […]

  • Golden Harvest Half Marathon

    El Pomar Youth Sports Park 2230 Executive Cir, Colorado Springs, CO, United States

    5k/10k/Half Marathon registration includes a custom bib, designer shirt, and a custom finisher medal! 1 Mile registration is untimed and includes a custom bib, designer shirt, and a custom finisher […]

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