Trail Running calendar near Vail 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.

The 1876 Centennial Run in Snowmass Village offers four unique distances, from a 3.76k to an 18.76k challenge. The event starts and ends at the New Belgium Ranger Station and is part of the Colorado Brewery Running Series, with proceeds sup..

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.

The High Lonesome 100 is a 101-mile mountain ultra through the Sawatch range. Runners traverse the Continental Divide, pass ghost towns, and climb over five alpine passes with 23,500 feet of total gain. This loop course offers a mix of sing..

Two trail races in Steamboat Springs on July 18, 2026: a 9.5 mile loop with significant climbing and rocky single track, and a 5k out and back on rolling two track. One aid station on the longer course, cupless event, prize raffle and post..

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 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.

High-altitude trail ultras near Cameron Pass in State Forest State Park: 100 km, 60 km or a double across alpine ridgelines, varied backcountry terrain, marked routes and stocked aid stations with limited entry.

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.

The Winter Park 50K offers a scenic point-to-point mountain run starting at Winter Park Resort in Colorado. Runners experience a mix of singletrack trails, forest paths, and dirt roads before finishing in town. Aid stations and finisher awa..

The Buena Vista Pack Burro Race offers a unique running experience in Colorado. Participants can choose a long or short course, racing either with or without a burro. The event includes finisher gifts, a meal, and awards for top finishers.

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.

Emerald Mountain Epic in Steamboat Springs on August 8 and 9, 2026 is a two day mountain bike and trail running weekend on scenic singletrack dirt trails. Race marathon, half or bike distances with a limited field of 500 per day.

Run along Boulder Reservoir on flat, mostly dirt trail courses with sweeping Rocky Mountain views. Choose from 10K, 3 4 marathon, half, full marathon or relay, with USATF certified courses, a shirt and a finisher medal.

Roxborough Ultras The Roxborough Ultras is a late-summer trail ultramarathon held in Roxborough State Park in Colorado. The event offers two distances: a 50K and a 50 mile race. The courses are fully marked and follow trails exclusively. Bo..

The Leadville Trail 10K Run takes place in August 2026. This out-and-back 10k course shares the start and finish of the famous Leadville Trail 100 Run, traveling on paved and dirt roads high in the Colorado mountains. It features one aid st..