Trail Running calendar near Marble 2025-2026

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, part of the Vail Trail Running Series. The half marathon covers approximately 13.7 miles with a challenging 2,924 feet of elevation gain, traversing trails across Arrowhead, Bachelor Gulch, and Beaver Creek..

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 Sneffels Round is a challenging mountaineering event held near Ouray, Colorado, with a 100-hour time limit. Participants choose their own routes to summit a selection of peaks from a map featuring 39 mountains, including many 13ers and the 14,150-foot Mt. Sneffels.The course covers roughly 75 mi..

The Cirque Series race at Arapahoe Basin, Colorado, is a challenging 9.2-mile trail run with 2,411 feet of vertical gain, set in the scenic White River National Forest. Starting at 10,780 feet at Mountain Goat Plaza, the course ascends through diverse terrain including summer roads, singletrack hiki..

The Breckenridge Oktoberfest 5K will take place in Breckenridge from Friday 12 September 2025 to Sunday 14 September 2025. You can run 5 kilometers.

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. The race is desi..

The Lead King Loop 25K is a scenic running and hiking event held in the heart of Colorado's Elk Mountains near Marble. Participants can run, walk, or hike the 25K course that winds through Lead King Basin, past the iconic Crystal Mill, and through the historic Town of Crystal, showcasing breathtakin..

The Ouray Mountain Trail Run is a 13-mile mountain race held in Ouray, Colorado, starting and finishing at Fellin Park. Participants experience challenging terrain paired with stunning mountain views and the unique charm of the town. The event supports the Ouray School through its Parent and Teacher..

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

The Sage Burner Trail Race takes place in the scenic Hartman Rocks Recreation Area near Gunnison, Colorado, surrounded by stunning views of the Maroon Bells, San Juan Mountains, and Gunnison Basin. This fall event offers three distances: 50K, 28K, and 15K, featuring a challenging course with technic..

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 Gothic Mountain Tour, hosted by Crested Butte Nordic in Colorado, is a challenging and scenic cross-country ski race circling Gothic Mountain. It offers two race distances: a competitive 23.5-mile course starting behind Crested Butte Community School, and a 17.85-mile recreational course beginni..

The 21st Annual Run Through Time Trail Marathon and Half Marathon takes place in Salida, Colorado, featuring challenging courses on dirt roads, jeep trails, and narrow, hilly single tracks with stunning views of Salida and the Arkansas Valley. Elevations range from 7,000 to 9,000 feet. The event inc..

The Silverheels Trail Runs, hosted by the Human Potential Running Series, is a premier trail running event held near Como, Colorado, at an average elevation above 10,000 feet. The event features multiple race distances including 10-Mile, 19-Mile, 60k, 50-Mile, 100k, and 100-Mile, with courses showca..