Trail Running calendar near Marble 2026-2027

Tackle a formidable 100-mile route with over 41,000 feet of climbing in Colorado's San Juan Mountains. This low-frills event requires volunteer service and awards cash prizes subject to drug testing. Finishers earn a distinctive belt buckle..

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..

Tackle the Stagecoach Trail at Powderhorn Mountain Resort. Choose between a steep 5K climb or a demanding 15K that goes up the mountain twice. The registration includes a lift pass, t-shirt, and post-race food.

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.

Experience high altitude trail running at 10,000 feet on the scenic Vail Mountain in Colorado. Choose between a 5K or 10K course featuring mountain views, wildflowers, and a unique gondola ride to the starting line.

The TransRockies Run is a three-day stage race through the Colorado Rockies, from Hope Pass to Red Cliff. Choose between the 51-mile Full Pint or the 35-mile Half Pint. Runners finish each day at a fully supported camp with meals, showers,..

Grand Mesa Ultras This trail running event takes place on the Grand Mesa in Colorado, described as the world's largest flat-topped mountain, with an average elevation over 10,000 feet. The event offers three race distances: 50 Miler, 55K, a..

Course and Terrain The Summit 200 is a 200-mile single-loop ultramarathon in Summit County, Colorado. The non-repetitive course utilizes hiking trails, 4WD roads, and recreation paths, with the majority being single-track trail and infreque..

Experience high altitude trail running at an average elevation of 10,600 feet in Fairplay, Colorado. Choose between a technical ultra marathon or a flowing half marathon through the scenic South Park Valley.

The Aspen Backcountry Maratons return on August 1, 2026 with three distances: 50K, marathon, and "heavy half" marathon. Participation requires a CORSAR search and rescue card, available online. This event is held alongside the Rotary Club A..

Experience a challenging 4.3 mile uphill climb on Vail Mountain featuring over 2,000 feet of elevation gain. This scenic singletrack race finishes at Mid Vail with stunning views and post run refreshments for all participants.

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.

The High Five 100 is a rugged, self-navigated 100-mile challenge near Lake City, CO. Runners must reach 24 checkpoints, summit 11 high peaks, and finish within 48 hours. There is no fee, no course markings, and no aid stations.

Event Overview Run the Rockies Trail Race is a trail running event held in Frisco, Colorado. The event offers three distances: a 5 km, a 10 km, and a half marathon. All races start and finish at the Frisco Nordic Center on Recreation Way. C..

The Leadville Trail 100 Run is a legendary 100-mile ultramarathon in the Colorado Rockies. With over 15,000 feet of elevation gain and a summit over 12,500 feet at Hope Pass, it's a massive high-altitude challenge. Finishers within 30 hours..

Experience the high-altitude scenery of Leadville on this 10K course, which follows the first and final miles of the famous LT100 Run. With a single aid station and awards for top finishers, it's a classic mountain run. Registration is open..

Experience high altitude trail running through the aspen groves and ski resorts of Arrowhead and Bachelor Gulch. Choose between a challenging half marathon with significant elevation gain or a scenic point to point downhill 5K.

This 40-mile point-to-point ultramarathon traverses the Elk Mountains from Crested Butte to Aspen, with over 6,000 feet of elevation gain. The event requires mandatory backcountry gear and supports Colorado Search and Rescue. Registration o..

A mountain trail race at Arapahoe Basin on September 5, 2026 covering *9.4 miles* and *2,211 ft* of ascent, with Sport, Expert and Pro divisions, a 700 runner cap, on course aid stations and category prizes.

The Trail Sisters Women's Half Marathon & 10k is a women's trail running weekend in Buena Vista, Colorado. The courses travel through sage and pine terrain with views of the Collegiate Peaks. It's presented as a supportive community event f..