Trail Running calendar near Crested Butte 2025-2026

The Run The Rockies Trail Race in Frisco, Colorado, offers 5k, 10k, and half marathon distances along scenic trails on the Frisco Peninsula. The course features single track and dirt road trails with stunning views of Dillon Reservoir and the Ten Mile Range. Starting and finishing at the Frisco Nord..

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 region. It offe..

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 reaching a peak..

The Arrowhead Half Marathon & 5K is a scenic trail running event held in Arrowhead, Colorado, featuring challenging courses through the Arrowhead, Bachelor Gulch, and Beaver Creek Ski Resorts. The half marathon covers approximately 13.7 miles with 2,924 feet of elevation gain, offering runners breat..

The Telluride Mountain Run, held in Telluride, Colorado, is a demanding mountain race set in the scenic San Juan Mountains. Offering three distances—40 miles, 24 miles, and 13 miles—this event challenges runners with technical terrain including old mining roads, singletrack trails, alpine tundra, ex..

The Grand Traverse Mountain Run is a challenging 40-mile point-to-point ultramarathon held in Colorado, running from Crested Butte to Aspen across the Elk Mountains. The course follows the route of the Grand Traverse Backcountry Ski race and features over 6,000 feet of elevation gain, offering a dem..

The Creede Mountain Run, held in Creede, Colorado, is a challenging mountain race established in 1987 that celebrates the transition from summer to fall. Set in the scenic San Juan Mountains, the event offers four race distances: 2 miles, 12 miles, 22 miles, and a 50K ultra. The courses start in the..

The Cirque Series - Arapahoe Basin is a challenging mountain running event set for September 6, 2025, in Keystone, Colorado. Participants will tackle a 9.4-mile course with an elevation gain of 2,411 feet, starting at 10,780 feet. The race features three divisions: Sport, Expert, and Pro, catering t..

The Breckenridge Oktoberfest 5K is a festive running event held in historic downtown Breckenridge, Colorado, as part of the annual Oktoberfest celebration. This 5K trail run takes participants through scenic Town of Breckenridge Trails, showcasing beautiful fall foliage and changing aspens. The race..

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..

The Blisters & Brews Telluride 5k will take place in Telluride on Saturday 13 September 2025. You can run between 5 and 5 kilometers.

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 West Line Winder is a scenic trail running event held in Buena Vista, Colorado, featuring both 30K and 50K races. Set against the stunning backdrop of the Collegiate Peaks, participants can enjoy a mix of singletrack and forest roads, with significant elevation gain. This event caters to runners..

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 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. Starting and finishing at the base of Mo..

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 of the West Elk Mountains. The 26.2-mile course starts at Crawford Reservoir State Park, traversing gravel roads through farms near Needle Rock before entering..

The Sage Burner Trail Race takes place in the scenic Hartman Rocks Recreation Area near Gunnison, Colorado, surrounded by sagebrush-covered hills and offering stunning 360-degree views of the Maroon Bells, San Juan Mountains, and Gunnison Basin. This challenging trail event features distances of 50K..