Trail Running calendar near Louisville 2025-2026

The Sawmill Trail Runs is an annual trail running event held at Staunton State Park in Pine, Colorado, approximately 40 miles southwest of Denver. Established in 2013 and officially a race since 2017, it offers three distance options: 50k, 16-mile, and 8-mile runs. The course features scenic and cha..

The USCSA Cross Country Ski Racing Festival, held at Snow Mountain Ranch Nordic Center in Granby, Colorado, is a vibrant collegiate and junior skiing event scheduled for January 24-25, 2026. It features classic races of 15 km and 7.5 km for college and independent high school athletes, alongside CHS..

The Winter's End Snowshoe Races, held at Granby Ranch Resort in Granby, Colorado, offer a unique winter running experience on mostly groomed single and double-track trails. The event features multiple distances including a marathon, 14-mile, 7-mile, and 5k races, accommodating runners of all skill l..

The Rattler Trail Race, held in Colorado Springs at Palmer Park, offers runners a chance to experience scenic singletrack trails with panoramic city views and sights of Pikes Peak. The event features multiple distances: 50K, 25K, 10K, and 5K, catering to various skill levels. The course is known for..

Niwot's Challenge is a highly demanding ultramarathon held annually in Sedalia, Colorado, along the South Platte River in the Front Range. Modeled after the grueling Barkley Marathons, it features a mostly off-trail course requiring advanced navigation skills using map and compass, with no GPS allow..

The Greenland Trail Races take place annually in May at Greenland Open Space in Larkspur, Colorado. Offering four distances—4 miles, 8 miles, 25K, and the state's fastest 50K—the event features a scenic course through over 3,000 acres of native grasslands, ponds, oak hills, and ponderosa pine forest..

Endure Trail Runs, part of the Human Potential Running Series, is held annually at Mueller State Park near Divide, Colorado. The event offers multiple distances including a unique 12-Hour timed run, marathon, half marathon, and 10k, all featuring scenic double-track and single-track trails with no p..