Trail Running calendar near Glenwood Springs 2024-2025

The Leadville Trail Marathon and Heavy Half is a challenging running event that takes participants through the historic mining district of Leadville, Colorado. The marathon covers 26.4 miles, while the Heavy Half spans 15.4 miles, both reaching high altitudes, with the marathon topping out at Mosqui..

The Race in the Clouds Dirt Festival will take place in Alma from Thursday 10 July 2025 to Sunday 13 July 2025. You can run between 10 and 13 miles.

The Silverheels Trail Runs, part of the Human Potential Running Series, is an annual event featuring multiple race distances, including a 100-Mile, 100k, 50-Mile, 60k, 19-Mile, and 10-Mile. Set in the stunning Colorado Front Range at elevations over 10,000 feet, the course offers a mix of single tra..

The Leadville Silver Rush 50M is a challenging 50-mile trail run set against the stunning backdrop of the Rocky Mountains. Participants will navigate a course featuring significant elevation gain, technical climbs, and breathtaking views, making it a true test of endurance and skill. The event serve..

The Summit 200 is an extraordinary 200-mile mountain race set in Summit County, Colorado, featuring a challenging loop that showcases stunning hiking trails, forest roads, and scenic views. Runners will experience significant elevation changes, with the lowest point above 9,000 feet and sections rea..

The Sheep Mountain Ultras, part of the Human Potential Running Series, is a challenging trail running event held annually in Fairplay, Colorado. The 10th edition will feature a 50-mile race, a 50k, and a half marathon, all set against the stunning backdrop of the South Park Valley. With an average e..

The Leadville Trail 100 Mile Run, known as the "Race Across the Sky," is a prestigious ultramarathon held annually in Leadville, Colorado. Established in 1983, this grueling event challenges participants with a 100-mile out-and-back course that features extreme elevation changes, including a peak at..

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 traversing the scenic Elk Mountains. This event se..

The Cirque Series - Arapahoe Basin is an exhilarating mountain running event set in Colorado, featuring a challenging 9.2-mile course with a vertical gain of 2,411 feet. Participants start at an elevation of 10,780 feet and navigate through scenic trails, including the new Half Moon Vista and Argent..

Run Rabbit Run is an annual ultra-running event held in Steamboat Springs, Colorado, featuring both 50-mile and 100-mile races. Scheduled for September 12-13, 2025, the event attracts a limited number of participants, with 450 spots for the 100-mile race and 200 for the 50-mile race. The race is not..

The Crested Butte Ultra is a premier trail running event held in Crested Butte, Colorado, featuring three race distances: 50 miles, 55K, and 35K. Set against the stunning backdrop of Gunnison National Forest, participants can enjoy breathtaking views, vibrant wildflowers, and the beautiful autumn co..