Trail Running calendar near Breckenridge 2026-2027

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..

Experience a mountain trail race at Arapahoe Basin featuring a 9.4 mile course with over 2200 feet of vertical gain. Runners can compete in Pro, Expert, or Sport divisions for cash and gear prizes.

Join the community for a 5K run or walk on a brand new dirt course at the North Arvada Middle School Athletic Complex. Support local high school racers before taking on this off road route yourself.

The American Heroes Run takes place on September 11 and 12, 2026 in Longmont, Colorado. Participants can run various distances on a flat, fast loop course. The event honors American heroes with special awards and a patriotic theme.

Experience trail and road running at 8,236 feet in Nederland, Colorado. Choose between a trail half marathon, a 10K, or a family friendly 5K while supporting local youth programs.

Experience high altitude trail running at the Snow Mountain Ranch Trail Running Festival in Granby. Choose from distances ranging from 5 km to 50 km on scenic dirt and grass paths reaching nearly 10000 feet in elevation.

Tackle high-altitude trails in the Colorado Rockies. Choose between a demanding 50K or a 22K point-to-point course, both featuring single-track paths and significant climbs. This remote race requires experience and preparation.

Experience a scenic trail run through sage brush and ponderosa pines in the Rocky Mountains. Choose between a half marathon or 10k distance with stunning views of the Collegiate Peaks in Buena Vista.

Experience the historic landscapes of Meadow Mountain in Minturn with a technical trail race through alpine meadows and singletrack. Choose between 5K and 11K routes featuring beautiful views of the Gore Range.

Run through the fall colors of the Elk Mountains in Marble, Colorado. Choose from a scenic 25K, an 8-mile climb, or a kids 2.5K. All proceeds support the local charter school and registration includes a shirt, BBQ, and a finisher medal.

Experience the scenic trails of North Table Mountain in Golden with 5 and 10 mile races. Run through challenging switchbacks and loops to support families transitioning from homelessness.

Follow the historic Barr Trail on a 13.3 mile journey from Manitou Springs to the 14,115 foot summit of Pikes Peak. Experience a 7,800 foot vertical climb through Colorado forests and alpine terrain in this high altitude event.

Experience a 26.2 mile mountain run from Manitou Springs to the summit of Pikes Peak and back. This historic event features over 7800 feet of elevation gain and a 10 hour time limit.

Experience the trails of Crested Butte and the Gunnison National Forest. Choose from 50-mile, 55K, or 35K distances. This late September event offers mountain meadows, ridges, and vibrant fall colors.

Experience desert style single track and forest roads with views of the Collegiate Peaks in Buena Vista. Choose between 50k or 30k distances as part of the multi sport 14er Fest.

Experience a rugged trail adventure through the Colorado wilderness in Estes Park. Choose between a 50k run or bike and a heavy half marathon while supporting the local high school mountain bike team.

This bucket-list half marathon runs from Snowmass to downtown Aspen on the scenic Government Trail. It sells out quickly, with registration opening each May for the late September race.

Experience a stunning point to point trail race from Vail to Minturn. Run through golden aspen groves and high alpine terrain with distances of 26K and 14K available for up to 250 participants.

Experience the changing aspens of Colorado during this 5k trail run in Breckenridge. Finish on Main Street at Blue River Plaza and stay to enjoy the local Oktoberfest festivities.

Experience a high alpine 50k through the Colorado Trail and Sawatch Range. This mountain course features a significant climb to 13,150 feet with panoramic views of the Arkansas River Valley and Mount Princeton.