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  • Carbon Valley Half Marathon

    Firestone Regional Sports Complax 6850 Tilbury Avenue, Firestone, CO, United States

    Colorado at its Best – the Carbon Valley Half Marathon will showcase the beauty & diversity of Colorado’s best kept secret.  Small town charm with Big City services, nestled between […]

  • Hometown Half Marathon

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

    Join us for the annual Hometown Half Marathon & 5k/10k! A run local-themed event that is perfect for the whole family. The fun includes great swag (designer shirt, custom medal), […]

  • Miles over the Meadow 5K

    Parker Recreation Run Series
    Tallman Meadow Park 12335 Canterberry Parkway, Parker, CO, United States

    Parker Parks and Recreation Run Series invites you to come out and celebrate mom (or anyone) and run or walk 3.1 Miles over the Meadow in this fun filled 5K […]

  • Colorado Rockies Home Run 5K

    Coors Field 2001 Blake St, Denver, CO, United States

    Take part in the Colorado Rockies Home Run 5K Run/Walk (3.1 miles) that includes a scenic downtown course and lap around the warning track of Coors Field, there will also […]

  • Happy Smackah 5K

    McIntosh Lake 1905 Harvard St, Longmont, CO, United States

    Join your fellow community members at our annual 5K Fun Run/Walk supporting local families facing medical hardship.

  • Mother’s Day Trail Run

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

    A new Race Series for Colorado with 2 races over the Weekend for both WOMEN/Moms and their families!....Saturday, MAY 10th, 5k & Family 1 mile in Denver at GREAT LAWN […]

    $35.00

  • Science Stride 5K

    Boulder Reservoir 5565 N 51st St, Boulder, CO, United States

    The Friends of the National Center Science Stride 5k brings together our community for a common cause: Inspiring the next generation of scientists! This event provides an excellent opportunity for […]

    $50

  • Run for the Trees

    Mahaffey Park 3285 W 22nd St, Loveland, CO, United States

    We’re helping Parks and Rec celebrate Loveland's Arbor Day. Come enjoy food trucks, live music, and a 2 mile fun run to help raise money for the tree planting fund. […]

  • Women’s Distance Festival 5K

    North Monument Valley Park 1794 Culebra Ave., Colorado Springs, CO, United States

    The Womens’ Distance Festival is no longer an event for “women only”. This event is now a “community” event, supporting the Girls on the Run® of the Rockies. Girls on […]

  • Race for the Watershed 5K

    Cherry Creek State Park 4201 S Parker Rd, Aurora, CO, United States

    Join us for a fun-filled day of running, walking, and most of all, supporting the Cherry Creek Watershed! Lace up your shoes and get ready to hit the trail with […]

  • Run to the Shrine

    Featured Run to the Shrine
    Cheyenne Mountain Zoo 4250 Cheyenne Mountain Zoo Road, Colorado Springs, CO, United States

    Join us on Saturday, May 9 or Sunday, May 10, 2026, for Run to the Shrine, Cheyenne Mountain Zoo’s annual fundraiser run/walk. This 4-mile casual run/walk winds through the Zoo […]

  • Hometown Half Marathon

    Chatfield State Park 11500 N. Roxborough Park Rd, Littleton, CO, United States

    Join us for the annual Hometown Half Marathon & 5k/10k! A run local-themed event that is perfect for the whole family. The fun includes great swag (designer shirt, custom medal), […]

  • Colorado Women’s Classic

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

    We are excited for the 2026 Colorado Women's Classic! While focused on women, all genders are WELCOME at this event!

  • Fruita Trail Half Marathon

    18 Road Trailhead 18 Road, Loma, CO, United States

    This exciting half marathon course is a fun loop on the beautiful flowy single track in Fruita CO. With short steep climbs and descents featuring beautiful views of the nearby […]

    $105

  • Mother’s Day 5K

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

    The Denver Mother's Day 5K – It's What Colorado Moms Do! This year, all-you-can-eat pancakes and three sausage breakfasts with OJ or coffee will be provided by Flippin' Flapjacks for all registered participants. […]

  • Know. Grow. GO RUN. 5K

    HMS Richards Adventist School 342 42nd St SW, Loveland, CO, United States

    Come and GO RUN or walk our new cross country trail on campus.

  • Ram Party Trail Runs

    Buffalo Lodge Bicycle Resort 2 El Paso Blvd, Colorado Springs, CO, United States

    With plenty of race options for everybody centered around the beautiful Rampart Reservoir in Woodland Park, Colorado, you're sure to have a good time while you take in the epic […]

  • Dog Jog 5K

    Laramie Community College 1400 E College Dr, Cheyenne, WY, United States

    The Dog Jog 5k is back and better than ever! Join the pack and run for a cause. This dog friendly 5k welcomes runners and walkers of all ages (even […]

    $35

  • Black Canyon Ascent

    Black Canyon of the Gunnison National Park CO Hwy 347, Montrose, CO, United States

    The Black Canyon Ascent 6-mile Run and Challenge Walk features a tough, scenic course starting at an elevation of 6500' and climbing almost 2,000' to the rim of the Black […]

  • Endure Trail Runs

    Mueller State Park 21045 State Highway 67, Divide, CO, United States

    The Endure 12-Hour is a one-of-a-kind challenging 12-Hour timed event, designed by YOU… and tiny colorful balls. Each runner will pull colored balls from a bucket, which determines the loop they’ll […]

  • Memorial Day Run and March

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

    Special Forces Foundation is proud to announce the Annual Memorial Day Run & March. Be a part of the LARGEST food donation event in Colorado! The Memorial Day Run & March […]

  • Boneyard Boogie Trail Run

    Vail Trail Running Series
    Eagle Pool and Ice Rink 1700 Bull Pasture Road, Eagle, CO, United States

    The Boneyard Boogie kicks off the 2025 Vail Trail Running Series with a 14K or 6K scamper through pinyon groves and juniper shrubs on some of Eagle's most scenic single […]

  • Vallecito Lake Heavy Half

    Vallecito Lake 17454 Co Rd 501, Bayfield, CO, United States

    The Vallecito Lake Heavy Half Marathon is a beautiful and scenic course around Vallecito Lake. Nestled in the heart of the San Juan Mountains in Colorado, our race course takes […]

  • Ouray Backyard Ultra

    Fellin Park 1001 US-550, Ouray, CO, United States

    A Backyard Ultra. Complete an easy 4.167 mile course. If you finish in less than an hour—just a 14:24 pace per mile—you get to do it again at the top […]

  • Colfax 5K

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

    Come run City Park in the Colfax 5K!  Go for a PR in this chip-timed race – separate stroller-friendly start wave for families and walkers.  And, you can run with […]

  • Colfax Marathon

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

    New for our 20th Year! “WOW” at Every Mile To celebrate our 20th, every mile will have a WOW for runners. That moment every mile that gives you that WOW […]

  • Wild Horse Half Marathon

    High Lonesome Ranch 275 CR 222, De Beque, CO, United States

    Set against the breathtaking backdrop of the luxurious High Lonesome Ranch, this isn’t just a race—it’s a full weekend of adventure and celebration! Runners will enjoy a country cookout, campfires, live […]

  • Mt Sopris Run-Off

    Flying Dog Ranch 1625 Co Rd 111, Carbondale, CO, United States

    The Mt Sopris Run-Off takes place in Carbondale, CO and offers two distances – 10-Miles and 28k. Historically this race has been a part of the Town of Carbondale’s Mountain […]

  • Miles for Smiles 5K

    North Area Athletic Complex 19500 West 64th Pkwy, Arvada, CO, United States

    The Miles for Smiles 5K is a friendly event that begins and ends on the track at the North Area Athletic Complex (NAAC) in Arvada with a scenic trek along the Fairmount Trail in the middle. Join Right Start Events on May 15th, 2022 for this 5K and Adaptive Dash.

  • Canine On the Creek 5K

    Charlie's Place Animal Shelter 500 W Dumont Rd, Dumont, CO, United States

    Gather your family and friends, including your furry friends—don't forget Fido! Grab your running (or walking) shoes and join us in supporting FOCP (Friends of Charlie's Place), the Clear Creek […]

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