Trail Running calendar near Grand Mesa 2025-2026

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 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 Powderhorn Mountain Ultra and Vert Challenge, held at Powderhorn Mountain Resort in Mesa, Colorado, is a demanding trail running event set for July 19, 2025. Participants can choose between a 12-hour or 6-hour ultra race featuring a 10K loop with approximately 1,546 feet of elevation gain per la..

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 and the Smuggler-Union Hydroelectric Plant, reaching a high poin..

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 over 10,000 feet, the event features challenging, technical trails with rocky climbs, fast fore..

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 exclusively on dirt trails featuring diverse terrain with challenging ascents, descents, and significant elevation gain, peaking a..

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 mountain trail race held in New Castle, Colorado, featuring distances of 3.5K, 7.7K, and a challenging 13K course. The trail winds through Aspen groves and crosses streams in Colorado's Flat Tops, offering a family-friendly atmosphere suitable for runners and..

The Telluride Mountain Run, held in Telluride, Colorado, is a demanding mountain race set in the San Juan Mountains. It offers three challenging distances: 40 miles, 24 miles, and 13 miles. The course features old mining roads, singletrack trails, alpine tundra, exposed ridgelines, and high summits,..

The Grand Traverse Mountain Run is a challenging 40-mile point-to-point ultramarathon from Crested Butte to Aspen, Colorado, traversing the Elk Mountains with over 6,000 feet of elevation gain. Held annually, the race follows the route of the Grand Traverse Backcountry Ski race, offering runners a r..

The Imogene Pass Run will take place in Telluride on Saturday 6 September 2025.

The Ouray 50 Mile Endurance Run, held in Ouray, Colorado, is a challenging mountain ultramarathon featuring approximately 23,582 feet of elevation gain. Known for its technical and demanding trails, the course is set nearly two miles above sea level amidst stunning mountain scenery. This race is des..

Blisters & Brews is a 5k fundraiser race held in Telluride, designed for attendees of the Telluride Blues & Brews Festival to enjoy a morning of exercise before the festivities begin. The event supports the Telluride Adaptive Sports Program and features a scenic route that includes views of Bridal V..

The Ouray Mountain Trail Run is a challenging 13-mile race held in the scenic mountains of Ouray, Colorado, starting and finishing at Fellin Park. Participants are treated to stunning views and the unique charm of the town. This event serves as a fundraiser for the Ouray School, supporting education..

The Crested Butte Ultra, held in Crested Butte, Colorado, offers runners a chance to experience some of the nation's best trails through the stunning Gunnison National Forest. The event features multiple distances, including a 50-mile, 55K, and 35K race. Participants traverse single-track trails tha..

The Deep Creek Trail Half Marathon is a scenic 13-mile trail race held near Telluride, Colorado. Starting at the Telluride Airport on Last Dollar Road, runners descend to Deep Creek Corral before entering singletrack trails through aspen-filled woods along Deep Creek. The course offers a mix of terr..

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 West Elk Challenge is a scenic point-to-point trail marathon held in the North Fork Valley of Colorado, showcasing the peak fall colors. The 26.2-mile course starts at Crawford Reservoir State Park, traversing gravel roads through farms near Needle Rock, then climbing singletrack trails on Mt. L..