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  • Race to Cure Sarcoma 5K

    Berkeley Lake Park 4601 W 46th Ave, Denver, CO, United States

    The Race to Cure Sarcoma (RTCS) is the premier run/walk series in the United States, focused on raising awareness, providing education, and research funds for sarcoma. Each year, the Sarcoma Foundation of […]

  • MonsterDASH

    Sloan's Lake Park 1700 Utica Street, Denver, CO, United States

    Colorado's Favorite Halloween Runs....Each year the Theme Changes!! This festival on Sloan's Lake, brings scary music, tons of Blow Ups, Carnival Games and Scary Clowns. The 5k and 10k run […]

    $35.00

  • Hoofin’ It Through the Hollows 5K

    South Suburban Race Series
    deKoevend Park 6315 S. University Blvd., Centennial, CO, United States

    Runners of all ages and abilities, families, and dogs are all welcome to join us for this Halloween celebration!  Dress in your Halloween best for a chance to win prizes at the […]

  • Ghosts & Goblins 5K/10K

    Featured Colorado Runner Events Six Pack
    City Park - Denver 1700 N York St, Denver, CO, United States

    The Ghosts & Goblins 5K/10K is a family, friendly event to celebrate the upcoming holiday season. Start your holiday traditions with a fun morning of fitness and friends by joining […]

  • Odyssey Odyssey 5K

    Great Lawn Park 101 Yosemite St, Denver, CO, United States

    The Odyssey Odyssey Fun Run is entering its 9th year. It has always been centered around having fun and exercising our bodies.  It is an all-inclusive event, which is why […]

  • EAPL Zombie Run 5K

    Buchanan Park Recreation Center 32003 Ellingwood Trail, Evergreen, CO, United States

    EAPL's Zombie fun run 5K is on Sunday, October 26th at 10am! Run, walk, crawl family event supporting the Evergreen Animal Protective League (EAPL). Bring your family (doggies are welcome)! […]

    $30

  • MonsterDASH

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

    Colorado's Longest running Halloween race....since 2006, we have changed the THEME to this race year after year! We wil have scary music and a CIRCUS Themes Expo at the start/finish. […]

    $35.00

  • Narrowleaf Lake Run

    Boyd Lake State Park 3720 N Co Rd 11C, Loveland, CO, United States

    Brisk autumn running in Colorado – OH YEA! Join us for a family fun event with three distance options at the beautiful Boyd Lake State Park venue. What’s a “Narrowleaf” […]

  • Spooky Sprint Half Marathon

    Goose Gossege Park 3950 Mark Dabling Blvd, Colorado Springs, CO, United States

    Join us for the annual Spooky Sprint 5k/10k & Half Marathon! A fun, Halloween-themed event that is perfect for the whole family.

  • Colorado 24 Hour Run

    Colorado Youth Outdoors 4927 County Rd 36, Fort Collins, CO, United States

    Welcome to the Colorado 24 Hour Run! We aim to provide a fun, welcoming race experience that allows everyone to find a challenge, no matter where you’re at on your […]

    $90 – $200

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