Trail Running calendar near Crested Butte 2026-2027

A self guided 100 Miler around Lake City, CO that requires visiting 24 proof points and checkpoints in order. The course is unmarked and unsupported and must be completed within 48 hours.

Celebrate Colorado with a series of scenic trail runs in Snowmass Village featuring multiple distances and a unique 18.76k medal challenge ending with craft beer and live music.

Experience the Frisco Peninsula trails with a choice of 5 km, 10 km, or Half Marathon distances. Enjoy a scenic course featuring single track trails and dirt roads with views of Dillon Reservoir and the Ten Mile Range.

Experience the historic Race Across the Sky in the Colorado Rockies. This legendary 100 mile ultramarathon features over 15,000 feet of elevation gain reaching heights of 12,626 feet.

Experience the high-altitude scenery of Leadville on this 10K course, which follows the first and final miles of the famous LT100 Run. With a single aid station and awards for top finishers, it's a classic mountain run. Registration is open..

A technical mountain race above Telluride, Colorado, offering five routes from a hill climb to 65 miles, with high-altitude ridgelines and rocky, exposed terrain; intended for experienced mountain runners.

A mountain trail half marathon and a mostly downhill 5.6K in Arrowhead on August 22, 2026, featuring single-track terrain, a 9,560 ft summit, aid stations on the half, and age-group awards.

A 50 mile mountain ultramarathon in Ouray, Colorado with 23,582 feet of ascent on technical high elevation trails. Runners must meet a volunteer service requirement or pay a $100 opt-out; SPOT tracking and drug-tested cash prizes.

Experience a 40 mile point to point ultramarathon through the Elk Mountains from Crested Butte to Aspen. This high alpine challenge features 6000 feet of elevation gain and supports local recreational non-profit initiatives.

Experience a high altitude mountain run at Arapahoe Basin covering 9.4 miles and 2,211 feet of vertical gain. Runners summit Little Lenawee peak and finish with live music and professional photos at Mountain Goat Plaza.

The The Sneffels Round will take place in Ouray on Saturday 5 September 2026.

Trail running in Creede, Colorado with 50K, 22 mile, 12 mile and 2 mile courses through the historic mining district and near the Continental Divide. Several courses include specific cutoff locations and time limits.

A demanding 17.1 mile mountain trail race connecting Ouray and Telluride over the high altitude Imogene Pass. This event features steep rocky terrain and strict cutoffs for prepared athletes.

Experience a scenic trail run through sage brush and ponderosa pines in the Rocky Mountains. Choose between a half marathon or 10k distance with stunning views of the Collegiate Peaks in Buena Vista.

A trail race on Meadow Mountain in Minturn, Colorado featuring 11K and 5K routes across mountain meadows, historic sites, technical singletrack, aid stations offering water and Skratch hydration, and age group awards.

Discover the scenic Elk Mountains in Marble Colorado with trail races ranging from a 25 km loop to a kids fun run. Support a local charter school while enjoying peak fall colors and a post race barbecue meal.

A 13-mile mountain trail run in Ouray, Colorado, starting and finishing at Fellin Park. The event is a fundraiser for the Ouray School, is intended to be cupless with three water stations, and offers awards for top finishers.

A 5k fundraiser in Telluride that benefits the Telluride Adaptive Sports Program in remembrance of Felix Snow. The course starts and ends at Elks Park and the event includes post-race live music, free beer and yoga.

Experience the mountain ridges and meadows of Gunnison National Forest at the Crested Butte Ultra. Choose between 35K, 55K, and 50 mile distances on single track trails with stunning fall foliage.

Experience desert style single track and forest roads with views of the Collegiate Peaks in Buena Vista. Choose between 50k or 30k distances as part of the multi sport 14er Fest.