Trail Running calendar near Ouray 2025-2026

The Sky Pilots Ouray Backyard Ultra is a unique running event held in Ouray, Colorado, featuring a "last person standing" format. Participants complete a 4.167-mile course, and if they finish within an hour, they continue to run each hour until only one runner remains. The course is designed to be a..

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 private property typically closed to the public, including a segment across V..

The San Juan Solstice 50 Mile Run is an annual ultra-marathon held in Lake City, Colorado, typically around the Summer Solstice. Established in 1995, the event has evolved into a community benefit for local EMTs. The race features a challenging course that includes high mountain terrain and varying..

The John Cappis is a challenging mountaineering event held in Silverton, CO, honoring John Cappis, a co-founder of the Hardrock 100. Participants tackle an unmarked, off-trail course of approximately 50K with a significant elevation gain of 19,000 feet, navigating rugged terrain and varying altitude..

The Hardrock 100 is a challenging 100-mile ultramarathon held in the San Juan Mountain Range of Southern Colorado. Participants face a total elevation change of 66,394 feet, with an average elevation of over 11,000 feet. The course features a mix of 4WD roads, dirt trails, and cross-country sections..

The Ouray 100 Mile Endurance Run is a challenging ultramarathon set in the breathtaking San Juan Mountain range of Colorado. Participants face approximately 41,862 feet of elevation gain over the course of the race, making it one of the toughest endurance events. Runners must complete eight hours of..

The Silverton Alpine Marathons, taking place in Silverton, Colorado, offers an exhilarating trail running experience through the stunning San Juan Mountains. Participants can choose from three distances: a 50K, a marathon (approximately 26.7 miles), and an 8-mile run. The courses traverse historic m..

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. Scheduled for July 26, 2025, this challenging race offers participants breathtaking views of the San Juan Mountains, with elevations exceeding 12,000 feet. The course features pristine singl..

The Box Canyon Trail Races, set in the stunning high country of Telluride, Colorado, features two challenging courses: a 30K and a 10-mile race. The 30K course offers a scenic loop with approximately 5,800 feet of vertical gain, taking runners through alpine meadows and past iconic landmarks like Br..

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 High Five 100 is an ultra-running challenge held in Lake City, CO, designed for elite runners seeking a rigorous test of endurance. Participants must navigate a course that includes 22 designated locations, comprising 6 checkpoints for crew support and 16 proof points to verify their journey. Th..

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 South Fork, Colorado, featuring a challenging course that traverses the stunning La Garita mountains. Runners will experience diverse terrains, from arid forests to alpine tundra, with elevations exceeding 12,000 feet. The event emphasizes a..

The Telluride Mountain Run is an exhilarating and challenging race set in the stunning San Juan Mountains of Colorado, above the historic town of Telluride. Participants can choose from three demanding routes: 40 miles, 24 miles, and 13 miles, all featuring technical terrain that includes old mining..

The Creede Mountain Run, established in 1987, is a celebrated annual event held in Creede, Colorado, marking the transition from summer to fall. Participants can choose from four race distances: 2 miles, 12 miles, 22 miles, and 50K, all set against the stunning backdrop of the San Juan Mountains. Th..

The Grand Traverse Mountain Run is a challenging 40-mile ultra marathon that takes place from Crested Butte to Aspen, Colorado. Following the route of the Grand Traverse Backcountry Ski race, participants face over 6,000 feet of elevation gain while navigating the stunning Elk Mountains. This event..

The Ouray 50 Mile Endurance Run is a challenging ultramarathon set in the stunning mountain scenery of Ouray, Colorado. With an elevation gain of 23,582 feet, this race is designed to be more difficult than many 100-mile events, featuring highly technical trails and an average elevation nearly two m..

The Deep Creek Trail Half Marathon is a scenic trail running event taking place in Telluride, Colorado. The race begins at Last Dollar Road near the Telluride Airport and features a challenging 13-mile course that winds through beautiful Aspen-filled woods along the Deep Creek Trail. Participants wi..

The Crested Butte Ultra is an exciting running event set in the picturesque Crested Butte, Colorado, known for its exceptional trails. Participants can choose from three race distances: 50 Miler, 55K, and 35K, all of which traverse the stunning landscapes of Gunnison National Forest. Runners will en..