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  • Ugly Sweater Fun Run

    Vail Village 292 E Meadow Dr, Vail, CO, United States

    Grab your best and ugliest holiday sweater and join the Vail Recreation District for a fun-filled morning run through Vail Village on December 11th.

    $7

  • Candy Cane Chase

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

    Now in it's 5th Year...we will have 2 now courses at the Creek Oath and Westminster Park is finished! We get the same families coming back year after year, Celebrating […]

    $35.00

  • Ugly Sweaty Sweater 5K

    PLPOA Rec Center 45 Eagle's Loft Cir, Pagosa Springs, CO, United States

    Grab your ugliest sweater, running shoes, some friends and family, and come on out for the Ugly Sweaty Sweater 5k Fun Run/Walk. This family and dog friendly event starts at […]

  • Run Like a Reindeer 5K

    Hideaway Park 78841 US HIGHWAY 40, Winter Park, CO, United States

    Get ready to lace up your running shoes or Nordic boots and snowshoe, cross country ski, fat bike, or walk with snow cleats on the Fraser River Trail to the […]

  • Hot Chocolate 5K

    Pueblo YMCA 3200 E. Spaulding Ave, Pueblo, CO, United States

    Warm up your taste buds because you’re invited to the very first Hot Chocolate 5k Run! Come run your personal record and enjoy some post-race treats. This race is the […]

  • Resolution Run 5K

    Edora Pool Ice Center 1801 Riverside Dr, Fort Collins, CO, United States

    Run out the old year, and welcome the new! Now in its 42nd year, the Resolution Run is a family-friendly, neighborhood streets 5K starting & finishing at the Edora Pool […]

    $25 – $35

  • FAR Resolution Run

    Centennial Park - Cañon City Cañon City, CO, United States

    Does your new year's resolution involve being active? Setting healthy goals? Engaging with your community? Come start the year off right by joining Fremont Adventure Recreation for their third annual Resolution Run on the first day of the new year - January 1, 2022!

    $25

  • Rescue Run

    Norris Penrose Event Center 1045 Lower Gold Camp Rd, Colorado Springs, CO, United States

    Welcome back to Norris-Penrose Events Center / Bear Creek Park! Back in the beginning... The Rescue Run Start/Finish was at Norris-Penrose Events Center - After many wonderful years at Palmer […]

  • Resolute Runner 5K

    Memorial Park - Arvada 8001 West 59th Ave, Arvada, CO, United States

    The Resolute Runner 5K is the KICK OFF PARTY OF THE YEAR! It's time to be RESOLUTE, to retroactively earn your pumpkin pie and chocolate truffles, and to start the […]

  • New Year’s Day 5K

    Salida Scout Hut 210 East Sackett Avenue, Salida, CO, United States

    The New Year's Day 5k is a great way to kick off the new year! The event is a fun local tradition. We encourage costumes, and all people of all […]

  • RMRR Platte River Trailhead Park 5K/10K

    RMRR Trophy Series
    Platte River Trailhead Park Colorado Blvd and E 88th Ave, Thornton, 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 […]

  • 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 I

    PPRR Winter Series
    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 […]

  • CMRA Frozen Platte 8K

    Platte River Bar & Grill 5995 S Santa Fe Dr, Littleton, CO, United States

    The course will go north from there on the S. Platte trail, across the suspension bridge at the Big Dry Creek Trail, back south on the west side of the […]

  • Canceled Frosty’s Frozen Half Marathon, 10K and 5K

    Featured
    Hudson Gardens and Event Center 6115 S Santa Fe Dr, Littleton, CO, United States

    Frosty's Frozen Five & Ten is a flat and fast half marathon, 10K and 5K held each January in Littleton Colorado. The race starts and finishes at Hudson Gardens and […]

  • Trail Apples 4 Mile

    Chatfield State Park 11500 N. Roxborough Park Rd, 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.

  • Almageddon Winter Triathlon

    Alma City Park 59 Buckskin St, Alma, CO, United States

    Take on the ultimate winter endurance challenge at 10,653 feet in Alma, Colorado, the highest incorporated town in North America. The ALMAGEDDON Winter Triathlon combines fat biking, Nordic skiing, and […]

  • 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

  • Canceled Chilly Willy Half Marathon

    Chatfield State Park 11500 N. Roxborough Park Rd, Littleton, 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 […]

  • Freakin Freezin 5K

    Northfield High School 5500 Central Park Blvd, Denver, CO, United States

    It's that time of year when brave runners lace up, layer up, and take on the chill! The Freakin' Freezin' 5K is all about starting the new year with some […]

  • Arches Ultra

    Gemini Bridges Trailhead at Gemini Bridges, Moab, UT, United States

    Arches Ultra travels along the border of Arches National Park, using Bar M, Klonzo, and Klondike Trail Systems.  The trails are smooth and easy at points, technical slick rock at […]

  • Sourdough Snowshoe Race

    South Sourdough Trailhead 115 Co Rd 116, Nederland, CO, United States

    The race is intended to be a difficult and fun free of charge backcountry event; any and all plans can change due to trail conditions for the runner’s safety.  Snowshoes […]

  • Old Man Winter Rally 5K/10K

    Bohn Park 199 2nd Ave., Lyons, CO, United States

    Bundle up and get ready to run and/or ride Colorado's best mixed terrain at the Old Man Winter Rally in Lyons on February 6th. Runners can crush the 10K course of single track trails, red rock canyon and gravel paths while riders can choose a 50K or 100K of dirt, snow, climbs and thrills! With a ragin' after party with hot food and cold beer, what more could you want?

    $49

  • Running Up for Air

    Staunton State Park 12102 S Elk Creek Rd, Pine, CO, United States

    Running Up for Air unites our community over a shared passion for running and a desire to drive real, lasting change in the fight for cleaner air. Through endurance events […]

  • Westy Winter Waggle

    Winter Six Pack Series
    Westminster Promenade 10600 Westminster Blvd, Westminster, CO, United States

    It's the Westy Winter Waggle 5&10k! Come waggle with us along an accurately measured, professionally timed course where you're welcomed by super friendly volunteers who wanna waggle with ya in […]

  • Sweet Heart Run

    Fruita Community Center 324 N Coulson, Fruita, CO, United States

    This February, run your heart out, sweetheart! Choose between a 5K or 10K along the scenic Fruita Trail System, and don’t forget to dress up for the costume contest. After […]

  • Super Sunday Fun Run

    South Suburban Race Series
    Reynolds Landing 6745 S. Santa Fe Drive, Littleton, CO, United States

    Bring the entire family to run or walk before the big game and enjoy a post-race party at Breckenridge Brewery Farmhouse. Runners and walkers of all ages and abilities are […]

  • Toyota Super Half Mararthon

    Pioneers Museum 215 South Tejon Street, Colorado Springs, CO, United States

    The streets and trails of downtown Colorado Springs are not exactly the “Frozen Tundra of Lambeau Field” but on Super Bowl Sunday, Feb.8, 2026, more than 1,500 runners will race […]

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