Trail Running calendar near Marble 2026-2027

Sheep Mountain Trail Runs in Fairplay, CO offers 50 mile, 50k and half marathon courses at high elevation with technical trails and forest roads. The event includes stocked aid stations, a finisher medal, drop down options and a 16 hour tim..

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

A 6.9K uphill trail race on Vail Mountain that climbs Berry Picker Trail to Mid-Vail with 2,013 feet of gain, aid stations, post-race t-shirt, refreshments 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.

The High Five 100 - Lake City, CO will take place in Lake City on Friday 7 August 2026. You can run 100 miles.

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.

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 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.

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 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.

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

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.