Trail Running calendar near Breckenridge 2026-2027

A two day untimed trail event at New Belgium Ranger Station in Snowmass Village offering 3.76k, 5k and 10k distances. Completing all three earns the 18.76k Challenge medal; the event includes a free craft brew, medals, music, food, and vend..

Trail races on Frisco Peninsula offering 5k, 10k and a half marathon with single track and lakeshore finishes, marked courses and aid stations on the longer distances. Awards by overall and age categories and a post race plaza gathering.

Historic pack burro race in Leadville, Colorado at over 10,000 feet, with a long out and back of about 21 miles toward Mosquito Pass and a shorter 6 to 8 mile course. Teams pair one runner with one burro.

Pat's Pony Express is a trail race at Rampart Reservoir in Colorado Springs offering 8 mile and 16 mile distances. Founded in 1977, it takes place the second Saturday of August and includes a member discount.

A running event at Carter Park in Breckenridge on August 12, 2026 offering short and long course entries in Adult, Youth and Non-Binary Open divisions with published entry fees.

A multi-distance race at Boulder Reservoir, Colorado, featuring a mostly dirt and trail course with about 200 feet of elevation gain and views of the reservoir and the Rocky Mountains.

Trail ultras from Roxborough State Park to Sharptail Trailhead featuring sustained climbs, technical singletrack, and a long runnable finish, with full aid support and an emphasis on land stewardship.

Experience the trails of Cheyenne Mountain State Park with three race distances ranging from a 5K walk to a 25K mountain challenge. This chip timed fundraiser supports park conservation through scenic and high elevation courses.

Westminster Trail Race at Standley Lake in Westminster, Colorado offers five dirt-trail distances from 5K to 50K with lake and Front Range views on out-and-back and Y routes.

Summit Grays and Torreys Peaks in this 8.8 mile Colorado endurance event. Participants must carry a 20lb dry load while tackling 4,101 feet of elevation gain.

A 10 km out and back in Leadville on August 16, 2026 that uses the opening and closing sections of the LT100 Run course. Aid at the turnaround and liquids on the Courthouse lawn, minimum age 12, general registration open.

A 60 hour endurance challenge at Snow Mountain Ranch where runners repeat a 10 mile trail loop to reach milestone distances. Entry includes lodging, meals, training and recovery services.

A high-elevation, approximately 100-mile out-and-back ultramarathon in Leadville, Colorado, featuring Hope Pass and over 15,000 feet of climbing. The event uses an entry lottery and includes 11 aid stations, pacer allowance, and buckle awar..

Experience a high altitude trail run through the Rocky Mountains on 100 percent unpaved roads and trails. This dog friendly event in Fraser supports children facing cancer through the Shining Stars Foundation.

Experience high altitude trail running through the scenic singletrack and historic landmarks of Staunton State Park. Choose between a full or half marathon featuring sweeping mountain views and a festive post-race meal.

Trail races in Arrowhead, Colorado on August 22, 2026 include a 13.3 mile half marathon with 2,844 ft of climbing and a mostly downhill 5.6K. Courses run mostly on single track and finish at Arrowhead Village with awards and post race food.

A 5K trail race in Evergreen, Colorado on August 22, 2026, routed through lower Elk Meadow Park with course marshals. The event is cup-free, offers water refills at start and finish, and includes vendor tents and on-site food.

Rock Hawk Trail Races in Philip S. Miller Park, Castle Rock, CO offers 50K, 25K, 10K and 5K on rolling ridgeline trails with cup free aid stations, live split tracking, and official chip timing.

A community trail event at the Arapahoe County Fairgrounds on 08/29/2026 with a 5K run, a family 5K walk that allows leashed dogs, and a kids 1 mile plus demonstrations, vendors, and a pancake breakfast.

Run Like the Wind in Allenspark on August 29, 2026 features a 5K race, a 2K run/walk and a dog jog option. Proceeds benefit The Old Gallery and participating dogs are entered in an amateur dog show.