Trail Running calendar near Mount Princeton 2026-2027

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.

Tough Mudder Colorado on September 26, 2026 at Fort Carson offers 15K and 5K obstacle courses with named obstacles and finisher items, plus spectator passes and group or volunteer options.

A 24 hour loop race on the Palmer Divide near Palmer Lake, Colorado. Runners repeat a 0.82 mile loop at 7,240 feet to compete for distance, awards and 100 mile buckles while supporting local parks.

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.

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..

OUTLAST Colorado Springs is a 6 hour trail challenge with a 5K lap every hour for six rounds. Patches and a medal are awarded for laps completed and finishers are ranked on a national leaderboard with cash prizes for top times.

A high alpine 50k near Nathrop Colorado that follows the Colorado Trail, reaches about 13,100 ft, and covers roughly 33 miles with 7,000 ft of ascent. The race is organized by Freestone Endurance on permitted public lands.

A fall trail event in Buena Vista, Colorado on September 27, 2026 offering a 14K trail race with over 500 feet of elevation gain and a 5K along the Arkansas River. Both races start and finish at Vendor Village near the Eddyline Beer Garden.

A trail event in Hartman Rocks, Gunnison, Colorado featuring 50K, 28K, and 15K routes across slickrock, singletrack, and doubletrack with wide mountain views and event gear for participants.

A Woodland Park trail event featuring 50k and 10k options on singletrack and forest roads with views of Pikes Peak, stocked aid stations, and crew access for the 50k.

A point to point trail marathon and 30K on October 3, 2026, from Crawford State Park to Paonia. The event raises funds for the Nature Connection Summer Camp Scholarship Fund and includes shuttle service and on site packet pickup.

Multiple race distances run near the Royal Gorge Bridge, including a 5K road run, an 8 mile trail race and a 13.1 mile half marathon, plus a free kids Dinosaur Dash and a virtual race option.

The Camp 4 Coffee Cart to Cart Trail Race will take place in Crested Butte on Saturday 3 October 2026. You can run between 10 and 19 miles.

A Halloween-themed Aspen event with a timed 3.5 mile trail run and a 1 mile walk, pet-friendly course through Marolt foot path and Moore open space, water stations, costume prizes, raffle prizes, food trucks, and proceeds to the Aspen Anima..

A four-race trail series in city and county parks with increasing distances and varied terrain. The races are chip timed and overall awards require completion of all four events.

A fall trail race at Staunton State Park offering 50K, 25K, a 25K FishSlappers division, and a steep 5K, run on runnable singletrack with aid stations and fundraising for land and water conservation.

A four-race trail series in city and county parks with increasing distances and varied terrain. The races are chip timed and overall awards require completion of all four events.

Methodist Mountain Ultra The Methodist Mountain Ultra (MMU) is a trail race set on the Methodist Mountain trail system near Salida, Colorado. It takes place at the northern end of the Sangre de Cristo mountains. The event features two dista..