Trail Running calendar near Marble 2026-2027

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.

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.

On June 20, 2026 trail races of 10K and 5K return to Creekside Park in Beaver Creek with newly marked courses. Aid stations supply water and Skratch hydration, and the finish area includes food, t-shirts and age-group awards.

A five-race Colorado series consisting of four half marathons and a 25K across mountain towns and trails, held June–September 2026, with series scoring and events organized by HAL Sports and local nonprofit race organizers.

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.

Trail marathon and Heavy Half through Leadville’s historic mining district on June 27, 2026, reaching Mosquito Pass at 13,185 feet. The Marathon is a Leadville Trail 100 qualifier and general registration is sold out.

A three-race trail series at Sunlight Mountain Resort near Glenwood Springs featuring a 5K, 10K and half marathon, with specified bib pick up, aid station info, entry fees, age categories and podium prizes.

Trail Town Ten in Ridgway features a 10 mile lollipop course with San Juan Mountain views and a 5 mile out-and-back on the same dirt roads. The event is coordinated with Ridgway RiverFest and benefits the Uncompahgre Watershed Partnership.

A community 5K in downtown Leadville on July 4, 2026, with a youth category and an Independence Day parade afterward. Proceeds support local youth athletics and recreation.

A 12.2K uphill trail race in Vail, Colorado marking its 50th running, the Vail HillClimb gains 2,128 feet across dirt and gravel service roads to finish at Mid-Vail, with aid stations, race shirts, awards by age group and a post-race raffle..

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 trail event at the Crested Butte Nordic Center featuring a 15 km out and back run, a 25 km loop run, and a technical 25 km mountain bike race with alpine climbs and a Green Lake checkpoint.

A high-altitude out-and-back ultra in Leadville with about 8,000 feet of gain over 50 miles, multiple aid stations, and an LT100 Run qualifier; additional 15-mile and juniors 5K distances are offered.

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 mountain endurance race in Ouray, Colorado with about 41,862 feet of elevation gain and fourteen climbs. Entrants must complete eight hours of volunteer service or pay a $100 opt out; top finishers face postrace drug testing and..

A 100 mile loop through Colorado's Sawatch Range, the High Lonesome 100 covers about 23,300 feet of climb, includes 27 miles of the Continental Divide Trail and 35 miles of the Colorado Trail, and provides detailed maps and aid stations.

A three day 120 miles trail running event near Buena Vista Colorado using charity bibs that require a minimum $2,000 fundraising commitment. Successful fundraisers receive a registration code and donations are final and distributed in Decem..

A mountain trail event at Powderhorn Mountain Resort on July 18, 2026, with a *5K* climb gaining over 1,500 ft and a *15K* that repeats the ascent. Registration includes resort entry, a t-shirt, finisher item, post-race food, and a lift pas..

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.