Trail Running calendar near Snowmass Village 2026-2027

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.

Sheep Mountain Trail Runs in Fairplay Colorado features 50 mile, 50K and Half Marathon courses on high‑elevation mountain trails with maps, aid stations, and midrace drop options.

High alpine trail running in Aspen with 50K, marathon and heavy half marathon options and a finish festival at Rio Grande Park.

Mountain trail races in Winter Park CO on August 1 2026 with 50K, 21K and 10K courses through high-alpine singletrack and town finishes.

A steep 4.3 mile uphill trail race from Vail Village to Mid Vail with significant elevation gain, on course aid stations, finish food and age group awards.

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 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.

Trail races of 5K, 10K, and half marathon on Frisco Peninsula trails with lakeshore finishes at Dillon Reservoir on August 8, 2026.

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.

Trail run on August 12, 2026 at Carter Park in Breckenridge offering short and long course entries with adult youth and non binary categories.

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.

A high-elevation 10K in Leadville on the opening and closing miles of the LT100 Run course, featuring one aid station, age-group awards, and community race-week activities.

A 100-mile out-and-back ultramarathon in Leadville, Colorado with about 15,492 feet of climb, a summit at Hope Pass and 11 on-course aid stations.

Trail-based chip timed half marathon and 5K near Fraser, Colorado, on unpaved roads and trails, with aid stations and proceeds supporting the Shining Stars Foundation.

A mountain trail half marathon and a mostly downhill 5.6K in Arrowhead, Colorado, featuring shuttle access, multiple aid station stops on the half, awards and postrace refreshments.

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 Cirque Series at Arapahoe Basin on Sept 5, 2026 is a 9.4 miles mountain trail race with 2,211 ft of ascent on approved White River National Forest trails. The field is capped at 600 runners and includes a branded hat, bib and medal.

High altitude trail races in Empire, Colorado offering 50K and 22K point to point courses with significant elevation gain and remote terrain.

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.