Trail Running calendar near Vail 2025-2026

Run or bike alpine singletrack to Green Lake at Grin & Bear It in Crested Butte on July 11, 2026. Choose loop or out and back distances that climb above 10,000 feet for huge views and a fast descent to town.

Join the Life Time Silver Rush 50 Run in Leadville for a high alpine 50 mile out and back plus 15 mile and 5K juniors. With seven aid stations and Leadville Trail 100 Run qualifier spots, this is a true mountain challenge.

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.

Run three unforgettable stages across the Continental Divide near Leadville, Colorado, with epic fourteener views and campsite camaraderie each night. Choose the 51 mile Full Pint or 35 mile Half Pint, with limited entry for 500 runners.

Take on the Never Summer trail ultras near Gould, Colorado, with 60 km and 100 km routes across high alpine ridges, lakes and rugged terrain. Expect big climbs, wildlife sightings and a true mountain adventure.

The Summit 200 is a 200 mile loop from Frisco, Colorado, over high alpine trails and forest roads with nearly 40,000 feet of ascent. Limited to 100 runners and with remote aid, this epic self reliant race has a 110 hour cutoff.

Tackle high alpine trails at Sheep Mountain Trail Runs in Fairplay, Colorado on August 1, 2026, with options for a half marathon, 50k, or 50 mile. Expect rocky county and forest roads, aid stations, big views, and a supportive festival vibe..

Run the Aspen Backcountry on August 1, 2026, a rugged trail race from Rio Grande Park that climbs into high alpine terrain. Choose from marathon, 50K or heavy half courses and enjoy scenic singletrack, remote aid and festival vibes.

Run the Rockies Trail in Frisco, Colorado offers 5k, 10k and half marathon on scenic single track and dirt trails. Take in views of Dillon Reservoir and the Ten Mile Range with a lakeshore finish to cheer your arrival.

Two days of singletrack adventure in Steamboat Springs featuring mountain bike and trail runs through meadows and aspen with big climbs. Proceeds benefit local nonprofits and racers get aid stations and a lively finish.

Take on the iconic Leadville Trail 100 Run, a 100 mile ultramarathon through the Colorado Rockies that climbs to Hope Pass and delivers breathtaking high altitude views. A true test of endurance and grit.

Experience scenic high altitude trail running in Fraser, Colorado at the Byers Peak Stampede Half Marathon and 5K, a fundraiser for the Shining Stars Foundation. Tackle a challenging half above 9,500 ft or enjoy a dirt road 5K.

Staunton Rocks! Marathon and Half deliver high altitude singletrack through Staunton State Park, offering sweeping mountain views, alpine wildlife, and serious vertical gain. With just 150 spots per distance, this rugged trail run fills fas..

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.

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.

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.

Explore scenic mountain trails at Snow Mountain Ranch in Granby Colorado with distances from 5K to 50K, rolling singletrack and big alpine views. Take on the Moosehead or Baby Moose challenge for extra bragging rights.

Run Rabbit Run is a Steamboat Springs, Colorado trail ultramarathon on Sept 18 and 19, 2026 offering 50 mile and 100 mile courses with major alpine climbs. The race raises funds for northern Colorado charities.

Crested Butte Ultra offers high alpine single track racing in Colorado with 50 Mile, 55K and 35K options through Gunnison National Forest. Expect sweeping mountain ridge views, cupless aid stations, custom swag and a finisher buckle.

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.