Trail Running calendar near South Fork 2026-2027

A remote, unmarked mountain 50K near Silverton, CO with about 19,000 ft of gain; membership and strong off-trail mountain experience are required and support on course is minimal.

Trail Town Ten in Ridgway features a 10 mile lollipop course with San Juan Mountain views and a 5 mile out-and-back on the same dirt roads. The event is coordinated with Ridgway RiverFest and benefits the Uncompahgre Watershed Partnership.

A three-race trail series in Durango, Colorado in July 2026 that pairs evening trail races with local breweries and nonprofit beneficiaries. Each event offers trail distances from 5K to 10K, post-race awards and brewery afterparties.

An uphill community foot race in Telluride on July 4 following the Telluride Trail to San Sophia ridge, with age-group awards and proceeds supporting the Good Neighbor Fund.

A 100-mile loop in the San Juan Mountains near Silverton Colorado featuring about 66,500 feet of total elevation change and alpine terrain. The event publishes runner and volunteer manuals and supports local organizations.

A 100 mile mountain endurance race in Ouray, Colorado with about 41,862 feet of elevation gain and fourteen climbs. Entrants must complete eight hours of volunteer service or pay a $100 opt out; top finishers face postrace drug testing and..

A 100 mile loop through Colorado's Sawatch Range, the High Lonesome 100 covers about 23,300 feet of climb, includes 27 miles of the Continental Divide Trail and 35 miles of the Colorado Trail, and provides detailed maps and aid stations.

Mountain trail races in Silverton, Colorado on the historic Alpine Loop. Distances include a 50K, a marathon and an 8 mile out and back that pass ghost mining towns and reach California Pass near 12,926 feet.

A mountain road race in Silverton, Colorado on July 19, 2026 featuring a 12-mile summit route and an 11K out-and-back. The event includes jeep road climbs, a final scramble, aid stations, a cupless policy, and a six-hour time limit.

Creede 50 and 100 take place in Creede on July 25 and 26, 2026, offering 50 mile and 100 mile courses organized by Tempest Adventures. The event site provides runner information, course details, crew and pacer guidance, and support resource..

High altitude mountain trail races in Telluride on July 25th 2026, featuring a 30K with about 5,800 ft of gain and a 10 mile with about 3,500 ft, mainly on technical alpine singletrack and double track.

A combined national high school trail championship and a citizens race on the Salida Mountain Trails in Salida, Colorado on July 25, 2026. The 5.4 mile singletrack course includes steep climbs, switchbacks and a high point near 7,558 ft.

A 15 mile mountain trail run on August 1, 2026 that climbs about 3,100 feet and reaches over 12,000 feet at Kennebec Pass. The course offers alpine terrain and views of the Animas and Dolores River valleys while supporting La Plata County S..

High Five 100 is a self guided 100 mile challenge from Lake City, Colorado that visits 24 proof points and checkpoints in order. Runners navigate their own route, face significant elevation gain, and must return within a 48 hour cutoff.

A high-elevation 100 mile mountain ultramarathon near Durango, Colorado on August 14, 2026, covering roughly 104 miles with about 19,000 feet of climbing, staffed aid stations, required safety gear, satellite tracking, and a 38 hour cutoff.

A 200 mile loop race through the La Garita mountains around South Fork, CO, reaching elevations just under 13,000 feet. Organized by Tempest Adventures, registration closes Aug 1 and the listed entry fee is 1268 USD.

A technical mountain race above Telluride, Colorado, with five route options across mining roads, singletrack and alpine tundra. Courses climb to elevations above 13,000 ft and focus on the high-elevation trail experience.

A 50 mile mountain ultramarathon in Ouray, Colorado with 23,582 feet of elevation gain, technical high‑altitude terrain, mandatory volunteer service or opt-out donation, live SPOT tracking, and drug-tested cash awards.

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

Trail event in Creede, Colorado offering 50K, 22 mile, 12 mile and 2 mile options through mountain terrain and the town's historic mining district. Courses include Continental Divide sections and set cutoff points for each distance.