Trail Running calendar near Breckenridge 2025-2026

The Frederick Pack Burro Race will take place in Frederick on Saturday 20 September 2025. You can run between 6 and 10 kilometers.

The Pikes Peak Marathon will take place in Manitou Springs on Sunday 21 September 2025. You can run 26 miles.

The Crested Butte Ultra, held in Crested Butte, Colorado, offers runners a challenging and scenic experience through the Gunnison National Forest. The event features three distances: a 50-mile, 55K, and 35K race. Participants traverse single-track trails that wind through mountain meadows, ridges, a..

The West Line Winder is a scenic trail running event held in Buena Vista, Colorado, featuring two race distances: a 50K (30.6 miles) with 4,000 feet of ascent and a 30K (18.1 miles) with 2,080 feet of ascent. The courses traverse buttery singletrack trails, forest roads, and some paved sections, set..

The Golden Leaf Half Marathon is a scenic running event held annually in late September, starting at Fanny Hill in Snowmass and finishing at Koch Lumber Park in downtown Aspen, Colorado. The course follows the Government Trail, winding through beautiful Aspen groves, offering runners a picturesque a..

The 24 Hours of Palmer Lake is an endurance running event held in Palmer Lake, Colorado, featuring a 24-hour race on a scenic 0.82-mile loop course atop the Palmer Divide at 7,240 feet elevation. Surrounded by mountains, the race offers a community-driven atmosphere focused on pushing mental and phy..

The Sawatch Ascent 50k is a challenging high-alpine trail race held in Nathrop, Colorado, showcasing the stunning Sawatch Range. Covering 33 miles with 7,000 feet of vertical gain, the course features a mix of 26 miles of singletrack, paved, and gravel roads, including 12 miles on the Colorado Trail..

The 14er Fest 14K is a unique trail race held in Buena Vista, Colorado, in the heart of the Rocky Mountains. Covering 8.7 miles with over 500 feet of elevation gain, the course offers stunning views of the Collegiate Peaks, Arkansas River, and Buena Vista town. Runners start in the vendor village, t..

The Above the Clouds Ultra is an annual trail running event held in Woodland Park, Colorado, known as the "City Above the Clouds." It features two race distances: a 50K ultra and a 10K run. The course showcases stunning Colorado fall colors and offers fast, flowing singletrack trails around Rampart..

The Castle Rock Trail Festival, held in Castle Rock, Colorado, offers a variety of trail running events on the scenic ridgeline trails of Philip S. Miller Park and Ridgeline Open Space. Distances include a 5K, 10K, half marathon, and an ultra-distance 50K, catering to runners of all levels.Families..

The Bear Chase Race Endurance Festival is a trail running event held at Bear Creek Lake Park in Lakewood, Colorado. It offers multiple distances including 100K, 50 Mile, 50K, Half Marathon, 10K (Baby Bear), and 5K, catering especially to first-time ultramarathoners and trail runners. The course feat..

Rocky's Backyard Ultra is a unique ultra trail race held at the YMCA of the Rockies in Estes Park, Colorado, known as the highest organized Backyard Ultra in the world. Runners complete 4.167-mile laps on a challenging singletrack course featuring about 500 feet of elevation gain and loss per lap, w..

The Suffer Better Fall Trail Run is an annual mountain endurance event held at Staunton State Park, Colorado. The 9th edition, scheduled for October 11, 2025, features challenging courses including 50K and 25K distances, a unique 25K Fishslappers division involving fish catching, and a new 5K race...

The Rubey Rescue Run is a 5K uphill trail race held annually in Aspen, Colorado, on Buttermilk Mountain. Participants start near the Buttermilk Mountain Lodge and ascend 1,700 feet to the Cliff House, finishing with breathtaking views of the Maroon Bells. The event welcomes runners with or without t..

The Great Trailhead Foot Race 10 Miler takes place at Bear Creek Lake Park in Lakewood, Colorado, offering runners a scenic trail experience with single-track dirt paths against the backdrop of Denver’s skyline. Participants can choose between a 5-mile or a challenging 10-mile double-lap course. Reg..

The Indian Creek Trail Runs, part of the Human Potential Running Series, is an annual fall trail running event held at Indian Creek Campground in Sedalia, Colorado. Celebrating its 12th year, it offers multiple race distances: 5-Mile, 15-Mile, 55k, and 50-Mile, with time limits of 12 to 14 hours dep..

Beware The Bear Trail Races take place at Bear Creek Lake Park in Lakewood, Colorado, offering 5km, 15km, and a combined 5+15km double race, along with a 1km kids' run. The courses feature mostly dirt trails with a mix of single and double tracks, incorporating short steep hills, rollers, and varied..

The Colleen De Reuck XC Classic is a cross country running event held annually at Harlow Platts Community Park in Boulder, Colorado. Honoring renowned distance runner Colleen De Reuck, the race promotes health, fitness, and celebrates local Olympians, with 2025 honoring 2012 Olympic marathoner Yoshi..

The HRCA Backcountry Wilderness Half Marathon will take place in Highlands Ranch on Saturday 8 November 2025. You can run 13 miles.

The Canya Canon Trail Race will take place in Colorado Springs on Sunday 9 November 2025. You can run 4 miles.