Trail Running calendar near Grand Mesa 2026-2027

A three-race trail series near Glenwood Springs, Colorado, running June 27 to September 19, 2026, with 5k, 10k and half marathon options, bib pick up at Sunlight Mountain Resort and one aid station on the half marathon course.

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.

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 trail event at the Crested Butte Nordic Center featuring a 15 km out and back run, a 25 km loop run, and a technical 25 km mountain bike race with alpine climbs and a Green Lake checkpoint.

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 mountain trail event at Powderhorn Mountain Resort on July 18, 2026, with a *5K* climb gaining over 1,500 ft and a *15K* that repeats the ascent. Registration includes resort entry, a t-shirt, finisher item, post-race food, and a lift pas..

Experience the mountain trails of Aspen Snowmass with three distinct race distances. Runners can choose between a 50K trek across four mountains a 25K trail run or a 10K course starting from the Elk Camp Gondola.

Grand Mesa Ultras on July 25, 2026 in Grand Mesa, Colorado features high-elevation trail races in three distances with single track mountain terrain, camping options, and post-race awards and amenities.

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.

Trail races in Aspen offering 50K, marathon and heavy half-marathon on dirt trails with high alpine sections and significant elevation gain. Limited support and remote aid stations; finish-day festival and local Duck Derby take place at Rio..

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 two day running event in Snowmass Village on August 7 and 8, 2026 offering 3.76k, 5k and a single 10k plus an 18.76k challenge. Finishers receive a free New Belgium brew and event medals; proceeds support local nonprofits.

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.

A 40-mile point-to-point ultramarathon from Crested Butte to Aspen across the Elk Mountains with over 6,000 feet of climbing, five aid stations, mandatory backcountry gear and mandatory tracking; proceeds support Crested Butte Nordic.

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

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.

Low-key trail running event in Loma, Colorado offering Half Marathon, Marathon (26.2 Miles) and 50 Miler with a flat $50 entry fee. Registration runs April 5 to August 1, and participants may change distance on race day.

A mountain race day in Marble, Colorado on September 13, 2026, with a 25K loop, an 8-mile Quarry Climb, and a kids 2.5K; entries include a shirt, post-race BBQ, beer, and a finisher medal, and proceeds benefit Marble Charter School.

A 13-mile mountain trail run in Ouray, Colorado on September 19, 2026, starting and ending at Fellin Park. The race is a fundraiser for Ouray School, includes packet pickup, limited water stations, and awards for top finishers.