Trail Running calendar near Gunnison 2025-2026

The Hardrock 100 is a challenging 100-mile ultramarathon held annually in the San Juan Mountain Range of southwestern Colorado. The race features a counter-clockwise loop course with a total elevation change of approximately 66,394 feet, including 33,197 feet of ascent and descent. The average eleva..

The Silverheels Trail Runs, hosted by the Human Potential Running Series, is a premier trail running event held in Como, Colorado, featuring races at an average elevation above 10,000 feet. The event offers multiple distances including 10-Mile, 19-Mile, 60k, 50-Mile, 100k, and 100-Mile ultra races...

The Grin & Bear It is Crested Butte’s oldest trail challenge, held in Crested Butte, Colorado. The event features a 25 km loop run, a traditional 15 km out-and-back run, and a new 25 km mountain bike race introduced in 2025. The courses start and finish at the Crested Butte Nordic Center, showcasing..

The Leadville Silver Rush 50M is a challenging 50-mile trail run held in Leadville, Colorado, featuring 7,503 feet of elevation gain and reaching a high point of 12,024 feet. The out-and-back course traverses historic mining roads on the east side of Leadville, offering runners stunning views of the..

The High Lonesome 100 is a challenging 100-mile trail ultramarathon held in the Sawatch Range of the Colorado Rocky Mountains, starting and finishing near Mount Princeton. The loop course features 23,500 feet of elevation gain, reaching a high point of 13,100 feet and averaging 10,600 feet in elevat..

The Ouray 100 Mile Endurance Run is a challenging ultramarathon held in Ouray, Colorado, nestled in the scenic San Juan Mountains. Covering 100 miles with an elevation gain of approximately 41,862 feet, the course features fourteen significant climbs, including a final 5,000-foot ascent to the Bridg..

The Audi Power of Four Trail Run is a scenic trail running event held in Aspen, Colorado, featuring routes across the mountains of Aspen Snowmass. Scheduled for July 19, 2025, the race offers three distance options: 50K, 25K, and 10K, catering to a range of trail runners. Participants experience div..

The Silverton Alpine Marathons, held in Silverton, Colorado, offer runners a challenging and scenic trail experience in the San Juan Mountains. Participants can choose from three distances: an 8-mile out-and-back, a marathon (~26.7 miles), and a 50K (~31.8 miles). The marathon and 50K courses follow..

The Kendall Mountain Run is an annual mountain running event held in Silverton, Colorado, featuring two main distances: a challenging 12-mile race and an 11K. Starting at 9,318 feet in downtown Silverton, runners ascend jeep roads to a thrilling final scramble near the 13,066-foot summit of Kendall..

The Creede 100 is a challenging 100-mile ultramarathon held in Creede, Colorado, a historic mining town. The race features a scenic and rugged course through the San Juan Mountains, climbing above 12,000 feet and traversing the Continental Divide for 25 miles. Runners experience breathtaking views,..

The Box Canyon Trail Races in Telluride, Colorado, offer two challenging and scenic mountain runs: a 30K and a 10-mile race. The 30K is a tough loop featuring about 5,800 feet of elevation gain, passing landmarks like Bridal Veil Falls, the Smuggler-Union Hydroelectric Plant, and reaching a high poi..

The Grand Mesa Ultras, held on the Grand Mesa in Colorado, offers mountain trail races including a 50-mile, 55K, and 30K distance. Set on the world's largest flat-topped mountain with an average elevation above 10,000 feet, the course features technical rocky climbs, fast forest single track, alpine..

The Mountain Fair 4-Miler is a scenic running event held in Carbondale, Colorado, starting near Prince Creek Road and finishing at Sopris Park during the Mountain Fair. The 4-mile course is mostly a gentle downhill, beginning about three miles up Prince Creek Road and descending to Highway 133, then..

The Aspen Backcountry Marathon, held in Aspen, Colorado, offers three trail running distances: a 50K ultra, a marathon, and a heavy half-marathon. The courses run almost entirely on dirt trails featuring diverse terrain with challenging ascents, descents, and significant elevation gain, reaching ove..

The Sheep Mountain Ultras, part of the Human Potential Running Series, is a challenging trail running event held annually in Fairplay, Colorado. The race offers three distances: a 50-mile ultra, a 50k, and a half marathon, all starting and finishing at the Town of Fairplay Beach. Set at an average e..

The TransRockies Run is a renowned six-day, 120-mile stage race held in Colorado, offering an unforgettable trail running adventure through the Rocky Mountains. This multi-day event challenges participants with rugged terrain and scenic mountain landscapes, fostering a strong community atmosphere am..

The High Five 100 is an extreme ultra-endurance running challenge held in Lake City, Colorado. Covering an estimated 90 to 105 miles with over 40,000 feet of elevation gain, the course requires runners to summit five 14,000-foot peaks and six 13,000-foot peaks in the rugged San Juan Mountains. Parti..

Pyro's Push It Up Trail Run is a scenic trail running event held in New Castle, Colorado, featuring distances of 3.5K, 7.7K, and a challenging 13K course. The race takes participants through beautiful mountain trails, crossing streams and winding through Aspen groves in the Flat Tops area. It offers..

The Buena Vista Pack Burro Race, held in Buena Vista, Colorado, is a unique 14-mile pack burro running event and the third leg of the 2025 PBR Triple Crown. Participants race alongside their burros, donkeys equipped with pack saddles carrying prospector gear, over challenging terrain that reflects t..

The Leadville Trail 100 Mile Run, held annually in Leadville, Colorado, is a legendary ultramarathon known as the "Race Across the Sky." Established in 1983, this grueling 100-mile out-and-back course challenges runners with extreme Rocky Mountain terrain, starting at 10,200 feet and climbing to a p..