Trail Running calendar near Mount Princeton 2025-2026

Run high alpine single track with sweeping South Park Valley views at Silverheels Trail Runs in Como, Colorado. Pick ultras to shorter routes including 100 Mile and 100k, enjoy camping, and race small fields for a true mountain test.

Take on the Silver Rush 50 in Leadville, Colorado, a scenic trail and dirt road 50 mile mountain challenge with about 7,500 feet of climb and a high point near 12,024 feet. Top finishers can earn a Leadville Trail 100 qualifier coin.

Grin & Bear It in Crested Butte serves up high alpine singletrack with a scenic but demanding 25 km loop for runners and bikers plus a faster 15 km out and back. Expect big climbs, technical descents, limited aid and stunning mountain views..

High Lonesome 100 is a rugged 100 mile mountain loop in Colorado, crossing five alpine passes and sections of the Continental Divide and Colorado Trail. Mid July racing delivers big climbs, sweeping alpine views, and a true endurance test.

Barr Trail Mountain Race is a 12.6-mile summer mountain running event along Pikes Peak. The course starts at Cog Railway Station in Manitou Springs (6,570 ft), ascends Barr Trail to Barr Camp at 10,200 ft, then turns, descends, and finishes..

Three days of high alpine trail running around Leadville, Colorado crossing the continental divide from Hope Pass to Red Cliff with stunning fourteener views. Choose Full Pint or Half Pint stages, enjoy on site camp life with live bands, sh..

Pikes Peak Ultra invites trail runners to Colorado Springs with 20K to 50 mile courses, and the 50K and 50 mile routes summit Mt Rosa. Rugged granite trails, big elevation and epic mountain views await.

The Summit 200 is a rugged 200 mile loop around Summit County Colorado, climbing about 40,000 feet on high alpine trails. Capped at 100 and requiring a prior 100 mile finish, it rewards experienced runners with a scenic high altitude test.

Aspen Backcountry in Aspen, Colorado offers rugged trail races in 50K, marathon and heavy half distances with big elevation and stunning alpine views. Start and finish at Rio Grande Park and stick around for the Duck Derby festival.

Sheep Mountain Trail Runs in Fairplay Colorado offers 50 mile, 50k and half marathon courses across technical singletrack and alpine roads averaging over 10,600 ft. Expect sweeping mountain views, tough terrain and variable August weather.

Run the Rockies Trail in Frisco, Colorado is a scenic 5k, 10k and half marathon on single track and dirt roads with views of Dillon Reservoir and the Ten Mile Range and a lakeshore finish. The half gets new single track in 2026.

Run the legendary Leadville Trail 100, a 100 mile high country ultra through the Colorado Rockies with epic climbs to Hope Pass and rugged mountain scenery. Chase the iconic buckle and an unforgettable high altitude adventure.

Challenge yourself on the Cirque Series at Arapahoe Basin on September 5, 2026 in Keystone, Colorado. This scenic 9.4 mile mountain course with 2,211 ft of climbing delivers steep, technical trail and big alpine views in a capped field.

Epic point to point ultramarathon from Mt Crested Butte to Aspen across the Elk Mountains. Tackle 40 miles and over 6,000 feet of climbing on high alpine terrain while supporting Crested Butte Nordic.

Run alpine single track through Crested Butte meadows and ridges amid fall foliage and wildflowers, with 35K, 55K and 50 mile options. All finishers earn a custom shirt, BOCO hat and a finisher buckle.

Run the Sangre de Cristo Trail Festival in Westcliffe Colorado, a late September weekend of scenic mountain trail running with distances from 8 miles to an epic 100 mile option. Challenging courses, staffed aid, on site camping and a friend..

Run rolling single track and forest roads around Buena Vista, Colorado, with sweeping Collegiate Peaks views. Choose a 30K or 50K and soak up 14er Fest vibes with camping, live music and local vendors.