Trail Running calendar near Nathrop 2026-2027

A mountain trail event in Snowmass Village on June 5-6, 2026 offering a 6.6 mile Red Loop and timed 6 hour and 24 hour ultras, with campground hub, on-site amenities, and 2026 as the final year at Snowmass.

A team trail relay in Snowmass Village on June 5-6, 2026 covering 120 miles total, about 15 miles per runner, with substantial elevation gain, village camping and recreation center amenities. The event is closed.

An evening 5K on Vail Mountain starting and finishing at Nature Valley Mountain Plaza, run as a single mass wave over varied mountain terrain with cupless aid and multiple age categories including nonbinary.

A looped trail ultrafestival in Mueller State Park on June 6 to 7 2026 offering 100 mile, 100k, 50k and 25k races on smooth single and double track. Aid stations are crew accessible and a night run takes place at sunset.

A community memorial event in Colorado Springs offering an in-person 5K, a virtual 5K with mailed shirts and medals, and a 1 mile kids dash. All proceeds are donated to local charities in Aiden's name.

A trail event near Beulah, Colorado offering 50-mile and ~101-mile options across the Wet Mountains, with large elevation range and distinct east- and west-side ecosystems.

A mountain trail *10K* on Vail Mountain at nearly 9,000 feet with varied terrain, two cupless aid stations and a mass-start format. The race includes multiple age categories from 12+ and a $12,200 prize purse.

Races on June 14, 2026, through the sandstone formations of Garden of the Gods Park in Colorado Springs. Options include a 10 Mile, two 10K races (road and trail) and a 2.9 mile Youth Classic; registration windows and fees vary.

A three-day Leadville training camp (June 19-21, 2026) with guided day and night runs, course sections, expert discussions, on-course nutrition, and event swag; minimum age 17 and general registration is sold out.

Trail races at Rock Ledge Ranch in Garden of the Gods offer 100K, 50K and 35K routes through North Cheyenne Cañon and Pike National Forest, with significant elevation gain, aid stations, and specific crew and pacer rules.

Trail races at Creekside Park in Beaver Creek on June 20, 2026 feature 10K and 5K courses plus a kids fun run. New course routes will be marked and aid stations provide water and Skratch hydration.

Four Colorado mountain events include four half marathons and a 25K across June to September 2026, totaling 67.9 miles. The series is coordinated by HAL Sports with nonprofit organizers supporting local youth programs.

At 10,600 feet in Alma, Colorado, Race in the Clouds is a June 25 to 28 Dirt Fest featuring mountain biking, trail running, off road duathlon, youth races and meadow camping, with USA Triathlon sanctioning and age group awards.

A high altitude trail marathon and 15.46 mile Heavy Half through Leadville’s historic mining district, topping out at 13,185 feet on Mosquito Pass. General registration is sold out and a waitlist is available.

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 on June 28, 2026, held within the Donkey Derby Days festival. The 6 mile course features chip timing, staffed checkpoints, cash prizes, and family activities at the start and finish.

A Fourth of July 5K in downtown Leadville, CO, held above 10,000 feet. Proceeds support local youth athletics and youth entries are free.

A historic uphill trail race in Vail, Colorado celebrating its 50th edition on July 5, 2026. The 12.2K (7.6 mile) route gains 2,128 feet and finishes at Mid-Vail with aid stations, awards, a raffle and post-race refreshments.

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.

A historic Crested Butte trail event offering 15 km and 25 km runs plus a technical 25 km mountain bike course. Routes include long climbs, rocky singletrack and a Green Lake checkpoint with limited aid.