Blue Sky Trail Marathon

The Blue Sky Trail Marathon and Half Marathon will take place on October 18-19, 2025, in Fort Collins, Colorado. This event features a marathon distance of 26.7 miles with an elevation gain of 3,500 feet, and a half marathon distance of 13.4 miles with an elevation gain of 1,800 feet. The courses traverse the scenic trails between Horsetooth Mountain Park and Devil’s Backbone Open Space, offering a mix of smooth dirt trails and technical rock gardens.

Participants can enjoy a post-race BBQ and awards ceremony, making it a festive experience for both seasoned runners and newcomers. Visit the organization's website for the most recent information.