Great Western Trail Race

The Frederick Pack Burro Race is an annual 10K event held in Frederick, Colorado, celebrating the town's Miners Day heritage. The race follows a scenic course starting downtown at Fifth and Oak Streets, heading north along a trail through a tunnel to the Frederick Recreation Area, looping around Mil..

The Blue Sky Trail Marathon & Half takes place October 18 (Marathon) and October 19 (Half), 2025, in Fort Collins, Colorado. The races run on trails between Horsetooth Mountain Park and the Devil’s Backbone Open Space along the easternmost hogbacks of the Front Range. Elevation on course ranges..

Colorado 24 Hour Run takes place in Fort Collins, Colorado, at 4927 E. County Road 36. The event offers multiple distance options: 24-hour, 12-hour, and 6-hour races, plus 24-hour, 12-hour, and 6-hour relays.Runners complete laps on a one-mile dirt loop—the flat, scenic loop you’ll find in Colorado—..

Run the Ranch is an annual trail running event held at the scenic Sylvan Dale Guest Ranch in Loveland, Colorado. The race offers a variety of distances including 5K, 10K, and timed trail runs of 4, 6, and 12 hours, with options for solo runners and 4-person relay teams. Participants run on private r..

The Weld Your Mettle Running Festival, held in Eaton, Colorado, is a multi-day event featuring a variety of running challenges for all levels. Participants can choose from solo or relay races lasting 3, 6, 9, 12, 24, or 36 hours, including a 100-mile ultra with a 36-hour limit. Unique formats like t..

Crazy Legs 10k+ Trail Run is held at Devil’s Backbone Open Space in Loveland, Colorado, starting and finishing in the parking lot. The loop course runs through Hidden Valley, Hunter Loop, Laughing Horse Loop, and Wild Loop for roughly 10k+, with a low-key atmosphere. The route is flour-arrow marked..