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  • All-Out Polar Prowl

    Stenger Soccer Complex 11200 W 58th Ave, Arvada, CO, United States

    From the heart of the West Metro area and the Stenger Soccer Complex, All-Out brings you Polar Prowl! Along with its Endless Series sidekick in June… Summer Breeze, these 5K, 10K and Half […]

  • Sentinel Flurry 5K

    Golden View Classical Academy 601 Corporate Cir, Golden, CO, United States

    The Sentinel Flurry returns for the 2025-2026 School year! It will take place on January 10th, 2026.   Participants can sign up for the 1 mile, 5K or the Combo.  Combo […]

  • PPRR Winter Series

    PPRR Winter Series I

    Red Leg Brewing Company 4630 Forge Rd, Suite B, Colorado Springs, CO, United States

    The series consists of four progressively longer (LONG AND SHORT) races. Please note: You must choose your distance when registering. The Long Race starts at 10:00AM. Short Race starts at 10:20AM. The […]

  • Beaver Creek Uphill

    Beaver Creek Mountain PO Box 0058, Avon, CO, United States

    Come ski, board, or run with us until the sun comes up on some of the best ski slopes in Colorado! Kicking off the Winter Races is the Beaver Creek […]

  • Trail Apples 4 Mile

    Chatfield State Park 11500 N Roxborough Park Road, Littleton, CO, United States

    We host one race per month from November to March.  All races are at Chatfield State Park and start at 9:00 am on Saturday mornings.  Check-in starts at 8:15 am.

  • Colorado Cold Rush 5K/10K

    Coal Creek Golf Course 585 Dillion Rd, Louisville, CO, United States

    Starting at Louisville's Coal Creek Golf Course and running through neighborhoods, past fairways and along ponds and open spaces, the wintery 5k/10k sometimes has sun and 65* without a cloud […]

  • Prairie Dog Race Series

    Colorado Cold Rush

    Coal Creek Golf Course 585 Dillion Rd, Louisville, CO, United States

    Baby, it's cold outside... And we're gonna take it on, because that's what living in Colorado is all about. Let's conquer the elements together at this WINTERY January 5k/10k race. […]

  • Featured RunDenver Race Series

    Polar Bear 5K

    Washington Park - Denver 701 S Franklin St, Denver, CO, United States

    The RunDenver Series is the original running series in Colorado and has been a staple for over three decades. Produced by HAL Sports, the series promises a fun time through […]

  • Chilly Willy Half Marathon

    Cottonwood Creek Park 3920 Dublin Blvd, Colorado Springs, CO, United States

    It's winter time & it's cold, but don't hibernate!  Keep moving because it's a great time to go for a run whether you join us live or run virtual! We're […]

  • Rio Frio 5K

    Cole Park 300 Hunt Ave, Alamosa, CO, United States

    The Annual Rio Frio 5K on Ice is one of America’s most unique 5k races! This spectacular event is conducted entirely on the majestic frozen Rio Grande! Have you ever run on a frozen river? Come and try it out on January 29th in Alamosa.

    $25

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