Trail Running calendar near Vail 2025-2026

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.

TransRockies Run is a three-day, two-distance trail-running stage race across the Colorado Rockies. The route traverses the continental divide between Hope Pass and Red Cliff, Colorado, totaling 51 miles for The Full Pint (about 9,635 ft of..

Event overview The Never Summer races take place in July 2026 around Gould, Colorado, mostly inside State Forest State Park between the Never Summer Mountains and the Medicine Bow Mountains. Distances offered: 100 km (65.7 miles) 60 km (39..

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.

Event overview The Sheep Mountain Trail Runs is the 12th annual event held in Fairplay, Colorado, with the Start/Finish at the Town of Fairplay Beach. The race has a runner capacity of 300 and a time limit of 16 hours. The course sits at an..

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.

Run the Rockies Trail Race in Frisco, Colorado offers 5k, 10k, and half marathon distances on the scenic Frisco Peninsula trails, with views of Dillon Reservoir and the Ten Mile Range. The start and finish are at the Frisco Nordic Center. T..

The Byers Peak Stampede Half Marathon will take place in Winter Park on Saturday 22 August 2026. You can run between 5 and 21 kilometers.

The Leadville Trail 100 Mile Run will take place in Leadville on Saturday 22 August 2026. You can run 100 miles.

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.

The Grand Traverse Mountain Run will take place in Crested Butte on Saturday 5 September 2026. You can run 40 miles.

Ned Ned Run in Nederland Colorado blends scenic trail and road running through the foothills, offering a half marathon, 10K and fun 5K for all abilities. Family friendly and costumes encouraged, with leashed dogs welcome in the 5K.

The Run Rabbit Run will take place in Steamboat Springs from Friday 18 September 2026 to Saturday 19 September 2026. You can run between 50 and 100 miles.

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.

The West Line Winder will take place in Buena Vista on Saturday 26 September 2026. You can run between 30 and 50 kilometers.