Event details subject to change. Please confirm all information via event website.

  • Walk Like MADD

    Windsor Lake 100 N. 5th St., Windsor, CO, United States

    Walk Like MADD is MADD's signature fundraising event to help us raise both awareness and funds to end drunk driving and fight drugged driving. With every step taken and each dollar raised, walkers are supporting MADD’s lifesaving mission to keep our families and communities safe.

  • USAFA Half Marathon

    Farish Recreation Area 12005 Rampart Range Rd, Woodland Park, CO, United States
  • Miles for Migraine 5K

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

    Miles for Migraine will host its annual 2-mile Walk (or Intentional Movement of your choice), 5K Run and Relax Denver Event. This event is a fundraiser for Migraine & Headache Awareness, Treatment & Research. It's more than a walk/run - come connect with your local migraine & headache community, listen to our speakers & visit sponsors […]

  • Grizzly 2 Mile

    Thunder Ridge High School 1991 W Wildcat Reserve Pkwy, Highlands Ranch, CO, United States

    Every year TRXC hosts a race to begin the season and celebrate ThunderRidge High School Cross Country.  This season we will be holding a Grizzly 2-mile on the ThunderRidge campus to get the season going!  We are excited to give the community the opportunity to contribute to the program and race on campus.  Please register […]

  • Buffalo Run 5K

    Grand Lake Center 301 Marina Dr, Grand Lake, CO, United States

    Held during Grand Lake's iconic Buffalo Days weekend, the Buffalo Run 5k route passes through the charming town of Grand Lake, along the scenic shores of Colorado's highest and deepest natural lake, and past historic landmarks for one of the most unique races you'll ever experience! The race starts and ends at the Grand Lake […]

  • Summer Sizzler 5K

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

    Join us on July 15th, 2023 for the annual Summer Sizzler, featuring the amazing scenery of America the Beautiful Park!  Whether you are looking to run, walk or just enjoy the race SWAG this race is a sure thing for a great time and an incredible experience! This is a fun, family event for all […]

  • Erie Half

    Reliance Park 900 Weld County Road 1.5, Erie, CO, United States

    Join us for the Erie Half and 5k! The Hometown Race Series features half marathons and 5k distance events in outlying communities outside the Denver and Boulder metro areas. LOOK UP! At the Erie event, we often see the early morning skies with dotted with delightfully colorful hot-air balloons. Whatever distance you're ready to tackle, […]

  • Race for Research 5K

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

    The Annual Cancer League of Colorado Race for Research 5K is excited to be back to the full event you love at Washington Park in Denver! The Race for Research raises money for the Cancer League of Colorado, a non-profit charitable organization that is run entirely by volunteers with no paid staff or offices. The […]

  • Staunton Rocks! Trail Marathon

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

    Welcome to the Staunton Rocks! Marathon & Half Marathon, an event put on by trail runners for trail runners on August 28, 2021. Touring the renowned singletrack of Staunton State Park in Colorado’s Front Range Mountains southwest of Denver, the race will take you back in time as you glide by historic buildings and old milling operations.

    $90 – $130
  • Impact Uganda 5K/10K

    Howell Construction 8085 E Harvard Ave, Denver, CO, United States

    UPDATE: New Route and New Swag The new route starts at the same location and avoids crossing streets. Check out the new SWAG for this year. The Fifth Annual Impact Uganda Fun Run, an in-person run in Denver on August 17th at 8am, and a virtual run option for those who can't make it (or those who don't want to run […]

    $39
  • Please click here to submit your event for FREE to our online calendar.
    We do not allow events without physical locations (IE – virtual runs, runs with locations TBD, etc…).
    Please allow 48 hours after submission for an event to appear on the calendar. If you have already listed your event and would like us to update it, please contact us.