Trail Running calendar near Snowmass Village 2026-2027

Experience a historic Colorado tradition where runners and burros compete together. Navigate mountain trails and high altitude passes while carrying traditional mining gear in this unique world championship event.

A single 200-mile loop around Summit County, Colorado on trails, 4WD roads and rec paths, with elevations above 9,000 ft and sections over 12,700 ft. The field is capped at 75 runners and includes 12 aid stations, four sleep stations, and l..

STRS #4 - Tom's Baby on July 29, 2026 takes place at Tom's Baby Trailhead in Breckenridge, CO, offering short and long course entries with adult, youth, and non-binary categories and published entry fees.

Experience high elevation trail running in the mountains of Fairplay Colorado. This event offers three distances ranging from a half marathon on forest roads to technical ultramarathons through remote wilderness terrain.

Trail races in Aspen on August 1, 2026 offering 50K, marathon and heavy half marathon on dirt trails with substantial elevation gain. The event finishes at Rio Grande Park the same day as the Duck Derby festival with music and food.

A high-elevation trail race in Winter Park, Colorado on August 1, 2026 offering 50K, 21K and 10K courses over singletrack and dirt roads, with aid stations, age-group awards, and a town finish at Rendezvous Event Center.

A mountain trail race in Vail on August 1, 2026 featuring an uphill 6.9 km course with about 2,013 feet of gain, singletrack and doubletrack terrain, an aid station, post race refreshments, awards and a raffle.

A pack burro race in Buena Vista Colorado on Aug 2 2026 with 13.1 mile and 7.3 mile courses offered both with and without burros. Burro teams must meet specific equipment and conduct rules and finishers receive a gift and a meal.

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.

Trail races of 5k, 10k and half marathon on Frisco Peninsula trails with single track, lakeshore finishes, chip timing, aid stations for the 10k and half, and post race food and beer for participants 21 and older.

A traditional pack burro race at 10,200 ft in Leadville, Colorado on August 9, 2026. Teams of a runner and a burro follow marked mountain routes over historic mining trails with long and shorter course options and strict animal welfare rule..

STRS #5 Carter Park Scurry in Breckenridge on August 12 2026 offers short and long course entries across adult youth and non-binary divisions with published entry fees and a course map.

Summit Grays and Torreys Peaks in this 8.8 mile Colorado endurance event. Participants must carry a 20lb dry load while tackling 4,101 feet of elevation gain.

The Leadville Trail 10K Run on August 16, 2026 is a 10 km out and back that uses the opening and closing sections of the LT100 Run course at high elevation, with one aid station at the turnaround and age group and overall awards.

A 100 mile out and back ultramarathon in Leadville on August 22, 2026, featuring high alpine terrain and a peak at Hope Pass. The course covers about 99.7 miles with around 15,492 feet of elevation gain and includes 11 aid stations.

Experience a high altitude trail run through the Rocky Mountains on 100 percent unpaved roads and trails. This dog friendly event in Fraser supports children facing cancer through the Shining Stars Foundation.

Trail races in Arrowhead, Colorado on August 22, 2026 include a 13.3 mile half marathon with 2,844 ft of climbing and a mostly downhill 5.6K. Courses run mostly on single track and finish at Arrowhead Village with awards and post race food.

A 5k trail run starting at 11,000 feet at Copper Mountain on August 29, 2026, presented by Mammut. The run takes place during the Union Peak Festival, which includes live music and festival activities afterward.

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.

A mountain trail race at Arapahoe Basin on September 5, 2026 covering 9.4 miles and 2,211 ft of vertical. The marked course uses established trails in White River National Forest and finishes in Mountain Goat Plaza with live music and food.