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  • New Belgium Half Marathon

    Colorado Brewery Running Series
    New Belgium Brewing Company 500 Linden Street, Fort Collins, CO, United States

    Join us for the New Belgium Half Marathon and 5k on Sunday, October 4, 2026. The course starts and ends at this beautiful Fort Collins, Colorado brewery. The out-and-back course […]

  • Run Crazy Horse Marathon

    Featured
    Crazy Horse Memorial Ave of the Chiefs, Crazy Horse, SD, United States

    The Run Crazy Horse Marathon events begin in the shadow of the world's largest mountain carving,  Crazy Horse Memorial, and finishes in the heart of the Black Hills... Hill City, […]

  • OTILLO Swimrun

    Horsetooth Reservoir 4200 W County Road 38 E, Fort Collins, CO, United States

    Welcome to the world of ÖTILLÖ Swimrun! ÖTILLÖ Swimrun, the original swimrun race, embodies the spirit of adventure, endurance, and teamwork. Originating in Sweden, ÖTILLÖ translates to “island to island” […]

  • RMRR 8M and 5K

    RMRR Trophy Series
    Star K Ranch 16002 E Smith Road, Aurora, CO, United States

    Everyone – slow, fast, or in-between –  can win  at RMRR Trophy Series races.  With our handicap scoring system, we predict YOUR finish time based on recent running results, giving you a great […]

  • Rubey Rescue Run

    Buttermilk Ski Resort 38700 Highway 82, Aspen, CO, United States

    Join us for a 5K uphill race on Buttermilk Mountain—with your furry friends, or without! Starting at the base near Buttermilk Mountain Lodge (formally known as Bumps) and climbing 1,700 […]

  • Strides for Sierra 5K

    Sierra Elementary 7771 Oak St, Arvada, CO, United States

    Get your sweat on running or enjoy a leisurely stroll through the beautiful neighborhood surrounding Sierra Elementary!  Starting at 10:00am the little ones can participate in a 1K fun run […]

  • PPRR Fall Series I

    PPRR Fall Series
    Bear Creek Regional Park 245 Bear Creek Road, Colorado Springs, CO, United States

    The Fall Series consists of four trail races in four different city/county parks. The trails range from well-maintained to rocky with tree roots. Each event is a unique challenge at […]

  • Long View Marathon

    City Park - Fort Collins 1500 W Mulberry St, Fort Collins, CO, United States

    Showcasing a unique city-to-city trail connection, The Long View Marathon and Half Marathon runs from Fort Collins to Loveland. Together, Gnar Runners and Sweetheart City Racing bring a unique collaboration […]

    $65 – $120

  • CMRA Stone House Triple-Cross

    Stone House Park 2800 S. Estes St., Lakewood, CO, United States

    The race will begin just west of Estes St across from the Stone House Park on Bear Creek in Lakewood. It will head west mostly on dirt trails through the […]

  • Colorado Believe 5K

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

    Know that you're part of something bigger. By raising awareness, we can help other families who may still be searching for answers. Any funds raised will go to Dup15q Alliance […]

    $45.00

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