Trail Running calendar near Winter Park 2025-2026

The 10k @ 10,000 Feet is a renowned trail running event held in Steamboat Springs, Colorado, celebrated for its stunning mountain scenery. This challenging race features a 10k course, which is actually 6.8 miles, and a 5k option, both starting at the summit of Rabbit Ears Pass. Participants navigate..

The American Heroes Run is a commemorative running event held in Longmont, Colorado, designed to honor the heroes of 9/11 and celebrate patriotism. Participants can choose from various race distances, including a 100-mile run, marathon, half-marathon, 9.11-mile run, and a 5K, all set on a scenic 1.0..

The Black Squirrel Half Marathon, scheduled for September 6, 2025, takes place in Lory State Park, Bellvue, Colorado. This challenging 13.5-mile trail race features a mix of technical and non-technical terrain, with approximately 2,000 feet of elevation gain. Runners will enjoy stunning views of Hor..

Devil on the Divide is a challenging trail running event held in Empire, Colorado, featuring two race distances: a 50K and a 22K. Participants will experience breathtaking views of Clear Creek County and the Continental Divide, with the 50K course reaching altitudes over 13,000 feet and climbing mor..

The Cirque Series - Arapahoe Basin is a challenging mountain running event set for September 6, 2025, in Keystone, Colorado. Participants will tackle a 9.4-mile course with an elevation gain of 2,411 feet, starting at 10,780 feet. The race features three divisions: Sport, Expert, and Pro, catering t..

The HRCA Wildcat Mountain Trail Races, scheduled for September 6, 2025, in Littleton, Colorado, features a variety of events including a 10K, 10M, and a Kid's Race. The race begins at the Douglas County East/West trailhead and takes participants through the scenic HRCA Backcountry Wilderness Area. R..

Run Rabbit Run is an annual ultramarathon held in Steamboat Springs, Colorado, featuring 50 and 100-mile races through scenic mountain terrain. The event showcases challenging courses with significant elevation gains, including climbs over Mount Werner and Emerald Mountain. The 100-mile race offers..

The Breckenridge Oktoberfest 5K is an exciting running event that kicks off the annual Oktoberfest celebration in Breckenridge, Colorado. Set against the stunning backdrop of the changing aspens and beautiful mountain scenery, this 5K trail run takes participants through the picturesque Town of Brec..

The Ned Ned Half Marathon is a longstanding trail running event held in Nederland, Colorado, celebrating its 43rd year. Participants can choose from a half marathon, 10K, or 5K race, with courses winding through scenic dirt roads and single-track trails in the Colorado mountain town. The event is fa..

The Meadowgold 5k &10k will take place in Minturn on Saturday 13 September 2025. You can run between 5 and 11 kilometers.

The Snow Mountain Ranch Trail Race is a scenic trail running festival held in Granby, Colorado, featuring multiple race options including a 50K, 33K, half-marathon, 10K, and 5K. The courses wind through the picturesque Snow Mountain Ranch, offering challenging terrain with significant elevation gain..

The Pony Express Trail Run is a scenic trail race held at Rampart Reservoir, offering two distances: 8.5 miles and 16 miles. Participants enjoy running along well-marked single-track trails, crossing creeks, and observing wildlife amid Colorado's autumn landscape. The race emphasizes community and p..

The Red Feather Trail Jamboree is a three-day trail running event scheduled for September 26-28, 2025, in the scenic Red Feather Lakes region of Northern Colorado. Participants can choose from various distances, including a 50-mile race, a 50K, and a half marathon, all designed to be beginner-friend..

The 24 Hours of Palmer Lake is an endurance running event held on a scenic 0.82-mile loop surrounded by mountains at Palmer Divide, Colorado. Participants aim to cover the greatest distance within 24 hours, with awards for the top finishers and those who reach 100 miles. The event fosters a communit..

The Golden Leaf Half Marathon will take place in Aspen on Saturday 27 September 2025. You can run 13 miles.

The Emerald Mountain Trail Run is a scenic running event taking place in Steamboat Springs, Colorado, featuring two race distances: a 12k (approximately 7.75 miles) and a 4-mile run. The course begins at the base of Howelsen Hill and winds through beautiful aspen-lined single tracks, making it a pic..

The West Line Winder is a scenic trail running event held in Buena Vista, Colorado, featuring both 30K and 50K races. Set against the stunning backdrop of the Collegiate Peaks, participants can enjoy a mix of singletrack and forest roads, with significant elevation gain. This event caters to runners..

Rocky's Backyard Ultra is an exciting ultra trail running event held at the YMCA of the Rockies in Estes Park, Colorado. This unique race format challenges participants to complete a 4.167-mile loop every hour until only one runner remains. The course features stunning Rocky Mountain scenery, with a..

The Castle Rock Trail Festival, also known as the liveBIG Run, invites participants to challenge themselves on the scenic trails of Philip S. Miller Park and Ridgeline Open Space. This event caters to a wide range of athletes, offering various race options including a 5K, 10K, half marathon, and a 5..

The Bear Chase Race is an endurance festival held at Bear Creek Lake Park in Lakewood, Colorado, featuring a variety of race distances including 100K, 50 Mile, 50K, Half Marathon, 10K, and 5K. Scheduled for October 4-5, 2025, this event is ideal for both novice and experienced trail runners, offerin..