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  • Lory Summer Trail Series

    Into the Hills Eltuck 5K

    Lory State Park 708 Lodgepole Dr, Bellvue, CO, United States

    Join us each Tuesday evening in August for a fun series of shorter midweek trail races. Our goal is to offer a fun, low-key series of races designed to give […]

    $25 – $80

  • NoCo Urban Ultra & Relay

    Island Grove Park 501 N 14th Ave, Greeley, CO, United States

    A collaboration event between run.Windsor and Breakaway Athletic Events celebrating the Poudre River Trail. This long-distance race takes you on a sprawling tour of Northern Colorado via the picturesque Poudre River Trail. You'll enjoy […]

  • Continental Divide Trail Run

    Steamboat Springs Ski Resort 2305 Mt Werner Cir, Steamboat Springs, CO, United States

    Distances: 50k (9 hour cutoff) and 16 mile (7 hour cutoff) and 5 mile (New!)

  • 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 […]

    $39

  • We Run So They May Walk 5K

    Saint Peter Lutheran Church 9300 East Belleview Ave, Englewood, CO, United States

    When: Saturday, August 23, 2025, 8:00 a.m. (Check-in begins at 7:15 a.m.) Where: begins and ends at Saint Peter Lutheran Church, 9300 E. Belleview Ave., Greenwood Village. $40  includes race […]

  • Featured Winter Park Peak to Peak Summer Showdown

    Byers Peak Stampede

    High Country Stampede Rodeo 1741 Co Hwy 73, Winter Park, CO, United States

    Push your limits with these stunning, remote races in the heart of the Rocky Mountains - located just 60 miles outside of Denver! Our Half Marathon and 5K are perfect […]

    $5 – $70

  • Thirsty 13 Half Marahton

    Ska Brewing Durango, CO, United States

    It's a race.  It's a Brewfest.  It's the Thirsty 13 Half Marathon! Are you thirsty for gorgeous scenery?  You won't find a course more beautiful than this one.  With the […]

  • Vail Trail Running Series

    Arrowhead Half Marathon

    Arrowhead at Beaver Creek 160 Cresta Rd, Edwards, CO, United States

    The Vail Recreation District is excited to announce a NEW venue for one of our favorite events in the 2021 Dynafit Vail Trail Running Series - The Dynafit Half Marathon and 5K at Arrowhead in Beaver Creek on August 21st.

  • Rio Grande 100

    Brown Memorial Park 86 County Road 15, South Fork, CO, United States

    The Rio Grande 100 starts and finishes on the banks of the mighty Rio Grande River in beautiful South Fork, Colorado. The race takes you though the amazing La Garita […]

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