Trail Running calendar near Lake City 2025-2026

The Sky Pilots Ouray Backyard Ultra is a unique running event taking place in Ouray, Colorado. Participants tackle a 4.167-mile course, with the challenge of completing each lap within an hour to continue racing. The event continues until only one runner remains, who must complete one additional lap..

The Vallecito Lake Heavy Half is a scenic half marathon set around the picturesque Vallecito Reservoir in Colorado's San Juan Mountains. Scheduled for May 17, 2025, this unique race offers participants the chance to run on a course that includes sections typically closed to the public, such as a por..

The San Juan Solstice 50 Mile is an ultramarathon held annually in Lake City, Colorado, around the summer solstice. Established in 1995, the race benefits Lake City EMTs and features a challenging course through high mountain terrain, including creek crossings and snowfields. The event attracts arou..

The John Cappis is a challenging mountain endurance event held in Silverton, Colorado, on June 28, 2025. It features a roughly 50-kilometer course with approximately 19,000 feet of elevation gain, traversing peaks in the San Juan Mountains. The course is mostly off-trail and unmarked, requiring GPS..

The Hardrock 100 is a challenging 100-mile ultramarathon held in the San Juan Mountains of Colorado. It features approximately 66,000 feet of elevation change, with an average elevation of over 11,000 feet and peaks exceeding 14,000 feet. The race traverses rugged terrain, including dirt trails, 4WD..

The Grin & Bear It is Crested Butte’s oldest trail running event, featuring a 15 km out-and-back race and a new 25 km loop, both starting and ending at the Crested Butte Nordic Center. The event takes place in July and offers scenic routes through mountain trails with significant elevation changes,..

The High Lonesome 100 is a challenging 100-mile trail race set in the stunning Sawatch Range of the Colorado Rocky Mountains. Participants will experience a grueling course featuring 23,500 feet of vertical gain, reaching elevations of 13,100 feet. The race includes a loop that traverses beautiful s..

The Ouray 100 Mile Endurance Run is a challenging ultramarathon set in the breathtaking San Juan Mountain range of Colorado. Participants will face approximately 41,862 feet of elevation gain, making it one of the toughest endurance events. The race features stunning views and demanding climbs, culm..

The Silverton Alpine Marathons, taking place in Silverton, Colorado, offers an exhilarating experience for runners of all levels. Participants can choose from three distances: a 50K, a marathon, or an 8-mile run, all set against the stunning backdrop of the San Juan Mountains. The courses traverse h..

The Kendall Mountain Run, taking place in Silverton, Colorado, is a challenging running event featuring a 12-mile race and an 11K option. Participants will ascend from 9,318 feet to the summit of Kendall Mountain at 13,066 feet, culminating in a thrilling scramble for breathtaking views of the San J..

The Creede 100 is an exhilarating 100-mile ultramarathon set in the historic mining town of Creede, Colorado. With only 100 spots available, this challenging race offers participants breathtaking views of the San Juan Mountains, including climbs above 12,000 feet and scenic trails along the Continen..

The Box Canyon Trail Races in Telluride, Colorado, feature two challenging mountain courses: a 30K and a 10-mile race. The 30K course offers a scenic loop through high alpine terrain with approximately 5,800 feet of vertical gain, passing iconic landmarks like Bridal Veil Falls and reaching elevatio..

Grand Mesa Ultras is an exciting mountain running event held in Grand Mesa, Colorado, featuring races of 50 miles, 55K, and 30K. Set on the world's largest flat-topped mountain, participants can expect challenging trails with rocky climbs, flowing single tracks, and stunning alpine scenery. The even..

The Kennebec Mountain Run is a challenging 15-mile trail race set in the picturesque La Plata Mountains of southwest Colorado. Participants will navigate a rugged course featuring a significant elevation gain of 3,100 feet, reaching a peak of 12,200 feet at Kennebec Pass. The event promises breathta..

The High Five 100 is a unique ultra-running challenge held in Lake City, CO, designed for elite runners seeking an extraordinary test of endurance. Participants must navigate a course that includes 24 designated proof points and checkpoints, with the goal of returning to Lake City within a 48-hour t..

The San Juan Softie 100 is an ultra running event set in the stunning San Juan mountains of southwest Colorado. This challenging 100-mile race features an average elevation of nearly 10,000 feet and includes over 20,000 feet of vertical gain, making it a true test of endurance for participants. The..

The Rio Grande 100 is an exhilarating ultramarathon set in the stunning La Garita mountains of South Fork, Colorado. This challenging race features a course that starts and finishes along the banks of the Rio Grande River, taking participants through diverse terrains, including arid forests and alpi..

The Telluride Mountain Run is a challenging and technical race set in the stunning San Juan Mountains near Telluride, Colorado. Participants can choose from three demanding routes: 40 miles, 24 miles, and 13 miles, navigating through old mining roads, singletrack trails, and alpine tundra. Runners w..

The Creede Mountain Run, established in 1987, is a celebrated annual event held in Creede, Colorado, offering a range of race distances including 2, 12, 22 miles, and a challenging 50K. Set against the stunning backdrop of the San Juan Mountains, participants experience a scenic course that begins i..

The Grand Traverse Mountain Run is a challenging 40-mile point-to-point ultra marathon from Crested Butte to Aspen, Colorado, following the route of the historic Grand Traverse Backcountry Ski race. Participants traverse the Elk Mountains, gaining over 6,000 feet of elevation, and experience stunnin..