Trail Running calendar near Mount Princeton 2026-2027

Alderfer 5K Trail Race at Alderfer Ranch in Evergreen Colorado is a 5 km trail event with shuttle service from Wulf Rec Center. The course is cup free with no aid stations, and water and refreshments are available at the venue.

A professional pack burro race in Cripple Creek during Donkey Derby Days, featuring a 6 mile urban course, chip timing, checkpoint support, animal welfare rules, on-site activities and monetary awards.

A downtown Leadville Fourth of July 5K held above 10,000 feet, with adult fees rising from $25 to $30 after July 2 and free entry for youth 17 and under. Proceeds support local youth athletics and recreation.

A historic uphill trail race on Vail Mountain covering about 12.2K (7.6 miles) with 2,128 ft of gain, three aid stations, on-course hydration and a Mid-Vail finish with awards by age group.

Experience high altitude trail running through historic Colorado ghost towns and mines at over 10000 feet. Choose from distances ranging from 10 miles to 100 miles in the scenic South Park Valley.

Trail running and mountain biking near Crested Butte with 15 km and 25 km options. Courses include alpine climbs to near 11,000 ft, limited aid stations, and non traditional prize drawings.

A high altitude 50 mile out-and-back in Leadville on July 11, 2026 featuring about 7,500 feet of climbing and a 12,024 foot high point. The event also offers a 15 mile race, a juniors 5K, and serves as an LT100 qualifier.

Experience the STRS Horseshoe Gulch Grind in Breckenridge with short and long course options. This trail event offers categories for adults and youth starting from the Blair Witch Trailhead.

A 100 mile loop in Colorado’s Sawatch Range, the High Lonesome 100 covers about 23,300 feet of elevation gain and includes long sections on the Continental Divide and Colorado Trail with a 37 hour cutoff.

A two day festival in Centennial Park, Cañon City on July 17–18, 2026 featuring whitewater competitions and land based events. The program includes running and mountain bike races, raft rodeo, SUP activities, cardboard boat races and a ween..

Experience the mountain trails of Aspen Snowmass with three distinct race distances. Runners can choose between a 50K trek across four mountains a 25K trail run or a 10K course starting from the Elk Camp Gondola.

High-altitude trail races on Vail Mountain offering 10K and 5K courses that start near Gondola One, feature singletrack and gravel sections, on-course aid stations, post-race refreshments, and age-group awards.

A summer mountain trail race in Manitou Springs, Colorado, covering *12.6 miles* up Barr Trail to Barr Camp and back. The event is run under a Pike National Forest permit and is part of the Garden to Peak Challenge.

TransRockies Run is a three day stage race in Moab, Utah on July 19 to 21, 2026, offering two distance options called Half Pint and Full Pint along with a race guide and supporting event information.

Pikes Peak Ultra in Colorado Springs features 20K, 30K, 50K and 50 mile trail courses from Bear Creek Regional Park with substantial elevation change, cupless aid stations, and published maps and GPX files for each distance.

Creede 50 and Creede 100 take place in Creede on July 25 and 26, 2026, offering 50 mile and 100 mile courses with runner, crew, and pacer information provided by Tempest Adventures LLC.

A 10 mile trail race at Staunton State Park on July 25, 2026, with on-site games, vendor tents, and refreshments; the course has no aid stations and is cup free.

A mountain fundraiser in Conifer, Colorado on July 25, 2026 featuring a 10K, a USATF certified 5K, and a 2 mile fun run, followed by a street festival with live music, vendors, and family activities.

Experience a historic Colorado tradition where runners and burros compete together. Navigate mountain trails and high altitude passes while carrying traditional mining gear in this unique world championship event.

A single 200 mile loop around Summit County, Colorado, running above 9,000 feet with roughly 40,000 feet of climbing. Field capped at 75 runners, live GPS tracking provided, and a multi tier deferral policy with no refunds.