Trail Running calendar near Marble 2026-2027

A two day untimed trail event at New Belgium Ranger Station in Snowmass Village offering 3.76k, 5k and 10k distances. Completing all three earns the 18.76k Challenge medal; the event includes a free craft brew, medals, music, food, and vend..

Trail races on Frisco Peninsula offering 5k, 10k and a half marathon with single track and lakeshore finishes, marked courses and aid stations on the longer distances. Awards by overall and age categories and a post race plaza gathering.

Historic pack burro race in Leadville, Colorado at over 10,000 feet, with a long out and back of about 21 miles toward Mosquito Pass and a shorter 6 to 8 mile course. Teams pair one runner with one burro.

A running event at Carter Park in Breckenridge on August 12, 2026 offering short and long course entries in Adult, Youth and Non-Binary Open divisions with published entry fees.

A high altitude 100 mile out and back ultramarathon around Leadville Colorado, with over 15,000 feet of elevation gain and a high point at Hope Pass. Aid stations, drop bag locations, and pacers are part of the race structure.

A 6.2 mile out-and-back using the opening and closing miles of the LT100 Run course, the Leadville Trail 10K features paved and dirt roads at high elevation with one turnaround aid station and on-course nutrition from Neversecond and Skratc..

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.

The Ouray 50 mile run in Ouray, Colorado is a high elevation mountain course with 23,582 feet of climb, mandatory volunteer service or a $100 opt out, live SPOT tracking, and drug tested cash prizes for top finishers.

A point to point ultramarathon from Crested Butte to Aspen covering about 40 miles and over 6,000 feet of climb, held as a fundraiser for Crested Butte Nordic with mandatory safety gear and on course aid stations.

A 9.4 mile mountain race at Arapahoe Basin on September 5, 2026, with 2,211 feet of ascent across summer roads, established singletrack and new high alpine trails. The field is capped at 700 and the course uses White River National Forest t..

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

A women's trail running event in Buena Vista, Colorado offering a Half Marathon and a 10k on mountain trails with views of the Collegiate Peaks and the Arkansas River. Organized by Trail Sisters to increase women’s participation in trail ru..

A trail race on Meadow Mountain in Minturn, Colorado offering an 11K and a 5K route across singletrack and meadows with stream crossings, scenic mountain views, on-course aid stations, and finish-line t-shirts and refreshments.

Mountain races in Marble, Colorado on September 13, 2026 offering a 25K loop, an 8 mile quarry climb, and a kids 2.5K. Entries include a BBQ lunch, event shirt, finisher medal, and proceeds support Marble Charter School.

A 13 mile mountain trail run in Ouray, Colorado on September 19, 2026, held as a fundraiser for the Ouray School. The course starts and ends at Fellin Park, has limited water stations, and packet pickup is offered the day before and race mo..

Mountain trail ultramarathons in Crested Butte, Colorado on September 26, 2026 offer 35K, 55K and 50 Mile courses across alpine meadows and ridges. Aid stations are cupless and the event starts and finishes at Crested Butte Community School..

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 presented by ACG that runs from Fanny Hill in Snowmass along the Government Trail through Aspen groves to Koch Lumber Park, held each late September with registration opening in April.

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.

A *5K* trail run on Town of Breckenridge Trails that finishes at Blue River Plaza on Main Street during Breckenridge Oktoberfest. Field limited to 300 runners; first 250 registrants receive a long-sleeve technical tee and 21+ entrants get a..