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  • Splashland Triathlon

    Splashland Swimming pool 5895 CO. Hwy 17, Alamosa, CO, United States

    Catch a glimpse of the Great Sand Dunes National Park with six 14’nrs in the background Mt. Blanca, Colorado’s 3rd highest peak overlooks the valley floor.

  • Jungle Dash

    Chapungu Sculpture Park 5971 Sky Pond Dr., Loveland, CO, United States

    Come join us for a 1-mile fun run, as we kick off the Wild Wonderful Saturday events. Plan to stay and check out the Wild Zone. Welcome adventurers, explorers, and […]

  • Oktoberfest 5K Trail Run

    Riverwalk Center 150 W Adams Ave, Breckenridge, CO, United States

    The Oktoberfest 5K returns this fall on Saturday, September 13th, offering an active start to a festive weekend. Lace up your running shoes and experience the changing aspens and beautiful […]

  • Canceled Sloan’s Lake Search Party Marathon

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

    THE SUMMARY Did you know that the loop around Sloan's Lake in Denver Colorado is almost perfectly 2.62 miles around? Join us as we go around the lake every hour on the […]

  • Mighty Marmot Kids Trail Race #2

    Miller Ranch Open Space 1060 Ed6, Minturn, CO, United States

    Come join the Vail Recreation District for the 3rd Annual Mighty Marmot Kids Trail Race Series! Youths ages 4 to 10 are welcome to participate. Chose between 1 or 2 miles* to compete […]

  • D49 4.9K

    Falcon High School 10255 Lambert Rd, Peyton, CO, United States

    Join us for the D4.9k Run/Walk, a family-friendly event open to D49 staff, students, parents, and community members! Our mission is to offer an engaging, affordable, and healthy event for […]

  • St. Jude Walk/Run

    Auraria Tivoli Quad 1000 Larimer St, Denver, CO, United States

    Event Description: St. Jude Walk/Run is a family friendly 5K event, taking place at Dick’s Sporting Goods Park on September 23rd. Participants come together during Childhood Cancer Awareness Month to […]

    Free

  • Move Forward 5K/10K

    Regis University 3333 Regis Blvd Denver CO, Denver, CO, United States

    The Move Forward 5K/10K is an event created by the Doctor of Physical Therapy students at Regis University as a community outreach project. The proceeds from the event will benefit Canine Companions […]

  • Rock Cut Estes Park 5K

    Rock Cut Brewing Company 390 W Riverside Drive, Estes Park, CO, United States

    Join us for The Rock Cut Estes Park 5k on September 20, 2025, for a 5k-ish, fun run event that starts and ends at this awesome taproom in Estes Park. […]

  • Be Ovary Aware 5K

    America the Beautiful Park Cimino Dr, Colorado Springs, CO, United States

    Raise awareness for ovarian cancer and raise funds to support Coloradans with 7 different types of gynecologic cancers: Ovarian, fallopian tube, uterine/endometrial, cervical, vaginal, vulvar and peritoneal cancers. This event […]

  • Golden Leaf Half Marathon

    Fanny Hill 120 Lower Carriage Way, Snowmass Village, CO, United States

    13.1 mile trail race with nearly 1000 ft of elevation gain from Snowmass to Aspen

  • Mountain Chile Cha Cha Trail Races

    Reservoir River Ranch Pagosa Springs, CO, United States

    The Mountain Chile Cha Cha Trail Race offers a 5K and 10k race. The races begin just outside downtown Pagosa Springs, CO, on Reservoir River Ranch, where you'll run on […]

  • Estes Epic

    Estes Park High School 1600 Manford Ave, Estes Park, CO, United States

    Join us for the Estes Epic — a premier event featuring a 50k Bike Race, 50k Run, and Heavy Half Marathon. After a six-year hiatus, this challenging race returns, offering […]

  • Colorado Brain Tumor 5K

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

    The Colorado brain tumor community will come together for a 5K Walk/Run to raise awareness and funds to support the needs of patients with brain tumors and their families.

  • Canceled Rising Phoenix 5K

    Sylvan Dale Guest Ranch 2939 N CR 31D, Loveland, CO, United States

    The Rising Phoenix Festival & 5K Run/Walk for Suicide Prevention is Combat Recovery Foundation's first community awareness event. Runners, walkers, dogs and participants of all ages, volunteers, and spectators will […]

  • CDDR 5K Run to Rescue

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

    The Colorado Domestic Duck Rescue 5k Run to Rescue is a untimed fun run or walk to support the rescue and homing of domestic ducks dumped by their owners into […]

  • Palmer Lake .5K (Yes “Point” 5)

    Palmer Lake Regional Park 199 County Line Road, Palmer Lake, CO, United States

    The Fastest Growing (and shortest)  Running Event in CO is back!!! Awake the Lake will hold its 8th Annual PALMER LAKE .5K (Yes “Point” 5), and it just keeps getting […]

  • AAP Friends of Children Fund 5K

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

    Start your day with fresh air, movement, and unbeatable views at the AAP Friends of Children Fund 5K Fun Run & Walk! Set against the stunning backdrop of Sloan’s Lake […]

  • Mighty Marmot Kids Trail Race #3

    Beaver Creek Ice Rink 60 Avondale Ln, Beaver Creek, CO, United States

    Come join the Vail Recreation District for the 3rd Annual Mighty Marmot Kids Trail Race Series! Youths ages 4 to 10 are welcome to participate. Chose between 1 or 2 miles* to compete […]

  • Flyin’ Ryan Memorial 5K

    Monfort Park 2122 50th Ave, Greeley, CO, United States

    Join us for the inaugural Flyin' Ryan Memorial 5k , a heartfelt event dedicated to honoring the memory of Ryan Vomacka, an exceptional athlete and individual who left an indelible […]

  • Not So Flatt Breast Cancer Awareness Run

    Standley Lake 10200 W 100th Ave, Westminster, CO, United States

    Join us for the Not So Flatt Breast Cancer Awareness Walk and Run.  In 2021, my father lost his fight against breast cancer so we have put together an annual […]

  • Big Waves 5K

    Lifetime Fitness - Westminster 397 W 148th Ave, Westminster, CO, United States

    Hi Friends of Big Waves! We are looking forward to having everyone back for our family 5k this year! We are going to do a superhero theme, so come dressed […]

  • Cart to Cart Trail Run

    Camp 4 Coffee 4th st and Elk Ave, Crested Butte, CO, United States

    10 or 19 mile trail runs at the height of fall colors in Crested Butte.  Fun prizes to winners and random participants. https://www.cbmountainrunners.org

    $75

  • Mines Homecoming 5K

    Colorado School of Mines 1500 Illinois St, Golden, CO, United States

  • Miner Gold Rush 5K

    Prospect Ridge Academy 2555 Preble Creek Pkwy, Broomfield, CO, United States

    Prospect Ridge Academy is thrilled to present our Annual Miner Gold Rush and Fall Festival! All proceeds will benefit Prospect Ridge Academy, a public charter school providing a rigorous, quality […]

  • Paws In The Park 5K

    Boulder Country Fairgrounds Park 9595 Nelson Rd, Longmont, CO, United States

    Celebrate a summer of fund-racing with us at Paws In The Park 5k Race and Pet Walk! Enjoy live music, breakfast, and mimosas. See you there!

  • Mustang Music 5K

    Kinard Middle School 3002 E Trilby Rd, Fort Collins, CO, United States

    5K DETAILS: The 5K features a chip-timed race designed to show the beauty of the neighborhoods by Kinard Middle School.  Enjoy the music along the course provided by the Kinard […]

  • Tortoise & Hare 4K

    Tortiose & Hare Race Series
    Rolland Moore Park 2201 S Shields St, Fort Collins, CO, United States

    The Tortoise & Hare (T&H) is a low-key “handicap” series of seven races that are run monthly from October to April, typically on the first or second Sunday of the […]

  • Liberty Energy 5K

    City Park - Denver 2001 Steele St, Denver, CO, United States

    Please join Liberty for our 5K run and walk, benefitting the Bettering Human Lives Foundation. This family-friendly event will include live music, a beer garden, face painting, food trucks, and […]

  • Suffer Better 50K/25K Trail Run

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

    We are stoked to once again invite you all to come run with us at Staunton State Park, off of Highway 285 near Conifer, CO, on October 15, 2022.  We […]

    $65

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