Trail Running calendar near Marble 2026-2027

Collegiate Peaks Trail Run in Buena Vista, Colorado offers 25-mile and 50-mile loop options on single-track and jeep trails. Each loop starts near 8,000 feet and includes over 3,500 feet of elevation gain and loss.

Run the Sky Pilots Ouray Backyard Ultra in Fellin Park, completing a 4.167 mile loop each hour until one runner outlasts the field. Enjoy riverside trails, mountain views near 7,700 feet and shared aid.

Trail races in Eagle, Colorado on May 16, 2026 offering a **14K** and **6K** on mostly single-track with notable elevation gain, finish-line food, aid stations with Skratch hydration, and awards plus an afterparty at Capitol Public House.

Challengers tackle a 6 mile climb gaining 2000 feet of elevation to reach the South Rim of the Black Canyon. Choose between a timed run or a scenic walk ending with a mountain breakfast and park views.

Experience the beauty of the Roaring Fork Valley with a point-to-point trail race from Carbondale to Basalt. Choose between 10-mile and 28k distances featuring iconic single track trails and a festive finish at Rock Bottom Ranch.

Celebrate Memorial Day weekend with the Spirit Trail Race in Buena Vista, Colorado, a scenic trail event with marathon, half marathon and 9k options. Start in town square, enjoy Paddlefest fun, and support local nonprofits.

An inaugural river trail run on Memorial Day in New Castle, Pyro's "Push It Up" RIVER Run offers 3.5K and 7.7K courses and includes post-race barbecue, raffle, and awards to honor Pyro and fallen heroes.

A 20K run clockwise around Turquoise Lake near Leadville, CO, mixing 6.5 miles of hilly paved road with 5.5 miles of single track trail, with proceeds supporting Leadville youth athletics and a nominal day use parking fee.

A 5K trail run at the Leadville National Fish Hatchery with a cross country style route through subalpine forest around Evergreen Lakes and lower Rock Creek. Adults $15; youth 17 and under free.

Experience trail running in the Colorado Rockies at Snowmass Village. Choose between a single 6.6 mile loop or endurance challenges of 6 and 24 hours while enjoying mountain views and a village festival atmosphere.

Prepare for the Race Across the Sky at this three day training camp in Leadville. Run key sections of the 100 mile course alongside veteran guides and attend educational panels on nutrition and biomechanics.

A 50 mile mountain trail run in Lake City, Colorado on June 20, 2026 held as a benefit for Lake City EMTs. The course includes high alpine terrain with snowfields and creek crossings and requires prior ultra experience and a registered trac..

Trail 10K and 5K races in Beaver Creek on June 20, 2026 with a kids run, aid stations, post race food and age group awards. The event benefits the Vail Valley Charitable Fund.

Experience the peaks of Colorado through a series of four half marathons and a 25 km trail race. Run through iconic locations like Estes Park and Nederland while supporting local youth programs.

Experience a high altitude outdoor festival in the highest incorporated town in North America featuring trail running mountain biking and duathlon. Enjoy a weekend of racing and meadow camping surrounded by 14,000 foot peaks.

On June 27, 2026 in Leadville, Colorado two trail races run to Mosquito Pass at 13,185 feet. The marathon is 26.4 miles and the Heavy Half is 15.46 miles, with multiple on-course aid stations and a Leadville Trail 100 qualifying allocation.

A series of trail races at Sunlight Mountain Resort in Glenwood Springs, Colorado, held across multiple dates in 2026. The course is mostly singletrack with significant elevation change and a water only aid station on the run.

A July 4 5 kilometer run or walk in downtown Leadville, with downtown bib pickup and an Independence Day parade afterward. Adult entry is $25 and youth 17 and under may enter for free, with proceeds supporting local youth athletics.

A mountain trail race on July 5, 2026 in Vail, Colorado covering 12.2 km with about 2,128 feet of climb, starting at Vail’s Mountain Haus and finishing at Mid-Vail. Aid stations, race shirts, awards and postrace refreshments are provided.

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.