Trail Running calendar near Mount Princeton 2026-2027

At Fort Carson near Pike's Peak on May 30 to 31, 2026, Spartan offers multiple obstacle races at high elevation. Events range from a kids 1 to 3 km race to a 50 km Ultra and include a pre event workshop and spectator access.

A trail ultramarathon in Buffalo Creek, Colorado offering 50 mile and 50K courses on mostly singletrack through burned areas and ponderosa forest. Portions of proceeds support the North Fork Volunteer Fire Department and local groups.

A 20K loop around Turquoise Lake that starts on hilly paved road and finishes on single track dirt trail, with proceeds supporting local youth athletics. The 2026 edition follows a rerouted course due to storm damage.

A 10k trail race in Elk Meadow Park near Buchanan Park Recreation Center in Evergreen, CO, featuring a rolling-hills course, vendor tents and refreshments. The event is cup-free with water refills at the start and finish.

A four race trail series in Evergreen offering distances from 5K to half marathon across Elk Meadow, Alderfer, Staunton State Park and Bergen Peak. Events include vendor tents, rec trailer activities, and refreshments for participants and s..

A scenic *5 km* cross country race at the Leadville National Fish Hatchery on May 31, 2026, with dirt road, path and trail sections. Awards are given by age group and youth registration is free.

Six trail races across Summit County, Colorado, in summer 2026. Series registration includes long and short course options with adult, youth, and non binary categories and events at multiple Summit County trail heads.

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 two-day team relay in Snowmass Village on June 5 to 6, 2026, featuring teams of four or eight covering 120 miles and 17,888 feet of gain, with camping, village amenities and alpine trail scenery.

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 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 that walks and runs major sections of the Leadville Trail 100 course, pairs guided day and night runs with recovery and nutrition support, and includes panels, Q&A sessions and a provided running kit.

San Juan Solstice 50 Mile Run on June 20, 2026 uses MAProgress live tracking; entry was by lottery with 300 registered and 285 on the waitlist. All runners must carry a registered tracker which can be owned, borrowed, or rented.

Trail races in Colorado Springs with 100K, 50K and 35K courses that start and finish at Rock Ledge Ranch in Garden of the Gods, featuring significant elevation gain, aid stations, and on course support.

A trail run at Creekside Park on June 20, 2026 offering 10K and 5.2K courses as part of the Vail Trail Running Series; the race benefits the Vail Valley Charitable Fund and features aid stations, finish-line food, awards, and on-site maps.

A summer and early fall series of four half marathons and a 25K across Colorado in 2026, with options to enter three, four, or all five events; races include Estes Park, Georgetown to Idaho Springs, Mt Sneffels, Ned Ned, and Lead King Loop.

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 26.4 mile trail marathon and a 15.46 mile Heavy Half on Leadville mining trails, topping out at Mosquito Pass 13,185 feet. Both races feature multiple aid stations, specified parking and shuttle arrangements, and the marathon serves as an..

A 10 kilometer trail race at Alderfer Ranch in Evergreen Colorado on June 27 2026. The event includes shuttles from Wulf Rec Center, vendor tents, on-site food and water refill stations while the course is supported by course marshals.