Trail Running calendar near Gunnison 2026-2027

An unmarked 100 miles mountain challenge around Lake City with 40,000+ ft climb, five 14ers, a 48 hour cutoff, and a committee application process, August 7 to 9, 2026.

A two-day multi-distance run and hike in Snowmass Village offering 3.76k, 5k and a single 10k with an 18.76k challenge and a post-race New Belgium brew.

A traditional pack-burro race in Leadville, Colorado at over 10,000 feet where each team is one runner and one burro carrying mining tools. The long course is about 21 miles and a shorter 6 to 8 mile course is planned.

Scenic road races in Ouray and Ridgway on August 15, 2026 featuring a Half Marathon, 10K and Kids Fun Run with medals and awards.

A 10K out and back on the first and last 3.1 miles of the LT100 Run in Leadville, featuring high altitude terrain and one aid station at the turnaround.

A 200 mile loop race through the La Garita mountains, starting and finishing in South Fork, CO, with a short out and back section and high points near 13,000 feet.

A 100 mile out-and-back ultramarathon in Leadville with over 15,000 feet of ascent, high alpine passes, 11 aid stations, a lottery entry and belt buckle finish traditions.

Mountain races in the San Juan Mountains around Telluride with five technical routes up to 65 miles and sections above 13,000 ft.

A mountain trail event at Arrowhead on August 22, 2026 offering a 13.3 mile half marathon with 2,844 ft gain and a mostly downhill 5.6K.

A high elevation 50 mile mountain ultramarathon in Ouray, Colorado with 23,582 feet of gain, required volunteer service, SPOT tracking, and drug tested podium prizes.

A 5k trail run at Copper Mountain starting at 11,000 feet, held during the Union Peak Festival with music and festival activities afterward.

A 40 mile point to point mountain ultramarathon from Crested Butte to Aspen with over 6,000 feet of elevation gain and mandatory backcountry gear; a fundraiser for Crested Butte Nordic.

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

Trail races through Creede Colorado's San Juan Mountains offering 2 Mile, 12 Mile, 22 Mile and 50K routes on high elevation terrain with exposed alpine sections.

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.

Trail Sisters Women's Half Marathon and 10K in Buena Vista, Colorado, feature trail courses through sagebrush and ponderosa pines with views of the Collegiate Peaks, and offer both group and solo participation options.

Trail races on Meadow Mountain in Minturn CO offering 11K and 5K courses with aid stations, finish refreshments, age group awards and an afterparty.

Scenic mountain races in Marble, Colorado on September 13 2026 offering a 25K loop, an 8 mile Quarry Climb, and a kids 2.5K with post race BBQ; proceeds benefit Marble Charter School.

13 mile mountain trail run in Ouray, CO on September 19, 2026; a fundraiser for the Ouray School with cupless water stations and packet pickup before the race.

A 5 km fundraiser in Telluride supporting the Telluride Adaptive Sports Program. The downtown route climbs the river trail past Bridal Veil Falls and returns to Elks Park, finishing with live music, free beer and yoga.