Trail Running calendar near Mount Princeton 2026-2027

A Fourth of July 5K in downtown Leadville, CO on July 4, 2026; youth entry is free and proceeds support local youth athletics.

High Trails Retreat in Buena Vista July 9 to 12 2026 offers daily runs of 10 to 20 miles and an optional Hope Pass or Sawatch 14er climb. Stay riverside, share meals, relax by the river and pick routes with the group.

Multi distance trail event in Como Colorado on July 10 and July 11 2026, with courses above 10,000 feet ranging from 10 Mile to 100 Mile. Routes include single track, fire roads, historic mining terrain, and a point to point 100k.

A historic Crested Butte trail event on July 11 2026 offering a 25 km loop, a 15 km out and back, and a mountain bike route with alpine climbs, a Green Lake checkpoint, limited aid, and a required minimum water carry.

A high-altitude 50-mile out-and-back in Leadville with about 7,500 feet of gain, seven aid stations, off-site parking with shuttles, and LT100 qualifier coins; shorter 15-mile and juniors 5K options are also offered.

A high elevation 100 mile loop trail race in Colorado held July 17-18, 2026, covering roughly 23,500 feet of ascent. The route follows sections of the Continental Divide Trail and Colorado Trail, crosses five alpine passes, and passes two g..

Run scenic mountain trails around Aspen Snowmass at the Audi Power of Four Trail Run on July 18, 2026. Choose from 10K, 25K or an epic 50K and enjoy challenging terrain, alpine views and Audi supported race day energy.

A mountain trail race in Manitou Springs, Colorado, covering 12.6 miles up and back on Barr Trail to Barr Camp. Scheduled for July 19 2026, it is part of the Garden to Peak Challenge and runs under a Pike National Forest permit.

A three-day, fully supported trail stage race across the Colorado continental divide with Full Pint and Half Pint options, nightly camps, meals, showers and athletic therapy. Limited to 500 runners.

Trail races of 20K, 30K, 50K and 50 mile run from Bear Creek Regional Park in Colorado Springs on July 25, 2026, featuring crushed granite trails, sections with views of Pikes Peak, and summit options on the longest courses.

An ultra running event in Creede offering 50 mile and 100 mile courses across the San Isabel and Rio Grande National Forests over two days, organized by Tempest Adventures under a USDA Forest Service permit.

A non repetitive 200 mile loop around Summit County Colorado that reaches high alpine elevations above 9000 feet. The field is limited to 75 runners, with live GPS tracking, aid and sleep stations, and a 110 hour cutoff.

High-elevation trail and ultra races around Fairplay, Colorado, with 50 Mile, 50k and Half Marathon options, technical and remote terrain, aid stations, drop bags, pacer rules, and a 16 hour time limit.

A trail running event in Aspen on August 1, 2026 offering 50K, marathon and heavy half marathon distances on mostly dirt trails, with remote aid stations, high alpine terrain and a finish line festival alongside the Duck Derby.

Experience the Buena Vista Pack Burro Race in Colorado on August 2, 2026 with long and short courses and options to compete with or without a burro. Finishers enjoy a gift, pizza buffet, free photos and small town Triple Crown charm.

A self directed mountain 100 mile route from and back to Lake City with 24 required points, an estimated 90 to 105 mile practical route, and a 48 hour cutoff.

A trail race on the Frisco Peninsula offering 5k, 10k and half marathon courses with lakeshore finishes, chip timing, stocked aid stations, post-race food and beer, and marked single track and dirt trails.

Trail races at Cheyenne Mountain State Park feature 5K, 10K and a 25K summit course with about 3,450 feet of elevation gain; the 25K is a Pikes Peak Ascent qualifier and the event raises funds for park trail projects.

Run the scenic Leadville Trail 10K on August 16, 2026 in historic Leadville, Colorado, tracing the opening miles of the LT100 course at over 9,700 feet. Enjoy a fast out and back on paved and dirt roads with aid at the turnaround and awards..

A 99.7 mile out and back ultramarathon in Leadville, Colorado, with 11 aid stations, high altitude passes near 12,526 feet, and belt buckle cutoffs at 25 and 30 hours.