Trail Running calendar near Nathrop 2026-2027

Experience the natural beauty of Mueller State Park with various trail distances from a 10k to 12 hour timed ultra events. Choose between traditional distance loops or a unique randomized format determined by colorful draws.

A trail race day from Buffalo Lodge Bicycle Resort featuring five distances centered on Rampart Reservoir and Rampart Range Road. Courses include a 55 mile loop, a point to point 60K, a 50K out and back, plus 24K and 15K options with aid st..

Trail races in Eagle, Colorado on May 16, 2026 featuring a 14K and a 6K on mostly single track. Aid stations, finish-line refreshments, age-group awards and an afterparty at Capitol Public House follow the event.

Point-to-point trail races in Carbondale, Colorado offering a 10-mile and a 28k course over Prince Creek, Buckhorn and Glassier trails; organized aid stations and a weekend film festival accompany the event.

Trail running at Farish Recreation Area on May 23, 2026, with a half marathon, 10K, 5K and a free 1 mile kids run. Top three men and women place in each adult race and the first 200 finishers receive a race hat.

Spirit Trail Race in Buena Vista on May 24, 2026 offers marathon, half marathon and a 9k with start and finish at South Main Town Square near the Surf Hotel; proceeds support local outdoor and community groups.

Multi-distance Spartan obstacle races at Fort Carson near the Rocky Mountains, featuring steep climbs, rugged trails and high elevation. Events range from a 5 km Sprint to a 50 km Ultra and include a kids race and an obstacle workshop.

A mountain ultramarathon near Denver offering 50 Mile and 50K options on mostly singletrack trails, passing 1996 burn areas, ponderosa pines, and granite formations. Part of the proceeds support the North Fork Volunteer Fire Department.

A 20K clockwise loop around Turquoise Lake that mixes hilly paved road and single track trail, held May 30, 2026, with $40 adult registration and free entry for youth 17 and under. Proceeds support local youth athletics and recreation.

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 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.

Aiden's Adventure 5K in Colorado Springs is the fifth annual memorial run with on-site and virtual 5K options plus a 1-mile kids dash. The event includes race shirts, medals, family activities, and donates proceeds to local charities.

Mountain ultramarathons in Colorado’s Wet Mountains that move from mossy fir forests and alpine meadows to dry pinyon and sagebrush terrain, with limited fields and large elevation change.

A mountain trail 10 km on Vail Mountain at nearly 9,000 feet with varied terrain, two on course aid stations and a cupless policy with a provided collapsible cup. Multiple age categories and a total prize purse of $12,200.

Races through Garden of the Gods Park include a 10 mile road, 10K road and 10K trail, all finishing at Rock Ledge Ranch. The routes pass towering sandstone formations, include aid stations, and end with on-site post-race food and music.

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.