Trail Running calendar near Marble 2026-2027

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 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.

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.

A high-altitude 10K in Leadville on August 16, 2026 that follows the first and last 3.1 miles of the LT100 Run course on paved and dirt roads. One aid station is provided and awards will be given in overall, para and age categories.

A 99.7 mile out‑and‑back ultramarathon in Leadville, Colorado, across forest trails and mountain roads with 15,492 feet of elevation gain and a 12,526 foot high point at Hope Pass. Finishers under 25 or 30 hours receive a belt buckle.

A trail running event on August 22, 2026, offering a 13.3-mile half marathon with substantial elevation and a mostly downhill 5.6K. The race uses Arrowhead, Bachelor Gulch, and Beaver Creek trail networks and includes aid stations for the h..

A high elevation 50 mile mountain race in Ouray, Colorado on August 29, 2026. The course has 23,582 feet of climbing, required pre race volunteer service or a $100 opt out donation, and mandatory tracked location reporting.

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.

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.

A trail running event on Meadow Mountain near Minturn CO offering 11K and 5K courses on singletrack and dirt trails, on-course aid with water and Skratch hydration, postrace shirts, awards by age group and a series after party.

A mountain road race in Marble, Colorado on September 13, 2026 featuring a 25K through Lead King Basin, an 8 mile Quarry Climb, and a kids 2.5K. Post race BBQ and proceeds support Marble Charter School.

A 13 mile mountain trail race in Ouray, Colorado on September 19, 2026 that starts and finishes at Fellin Park. The event raises funds for the Ouray School and features aid stations and awards for top finishers.

A mountain ultramarathon in Crested Butte, Colorado on September 26, 2026, offered in 35K, 55K and 50 mile distances. Courses run through Gunnison National Forest with single track trails, alpine meadows, cupless aid stations, and on course..

Experience desert style single track and forest roads with views of the Collegiate Peaks in Buena Vista. Choose between 50k or 30k distances as part of the multi sport 14er Fest.

A scenic half marathon from Fanny Hill in Snowmass along the Government Trail through Aspen groves to Koch Lumber Park in downtown Aspen, presented by ACG and hosted by the Ute Mountaineer and the City of Aspen each late September.

A point to point trail race from Vail to Minturn with 26K and 14K courses across Vail Mountain. Both routes feature alpine singletrack, scenic views of Mt. Holy Cross, staffed aid stations and a post race lunch voucher.