Trail Running calendar near Conifer 2025-2026

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..

The Breckenridge Oktoberfest 5K is a festive running event held in historic downtown Breckenridge, Colorado, as part of the annual Oktoberfest celebration. This 5K trail run takes participants through scenic Town of Breckenridge Trails, showcasing beautiful fall foliage and changing aspens. The race..

The MeadowGold 11K & 5K running race is part of the Vail Trail Running Series and takes place in Minturn, Colorado. This event offers two distance options, an 11-kilometer and a 5-kilometer race, providing opportunities for runners of varying abilities. The race is set in a scenic mountain environme..

The Ned Ned Half Marathon is a long-standing trail running event held in Nederland, Colorado, a picturesque mountain town. Celebrating over 43 years, the race offers a challenging half marathon covering 13.3 miles with 1,408 feet of elevation gain, featuring dirt roads and single-track trails that s..

The Snow Mountain Ranch Trail Running Festival in Granby, Colorado, offers a scenic and challenging trail running experience with race distances of 50K, 33K, Half Marathon, 10K, and 5K. Set at the YMCA of the Rockies, the courses feature 100% dirt terrain with rolling hills, golden aspen groves, and..

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 Pikes Peak Marathon, held annually in Manitou Springs, Colorado, is the oldest continuously run marathon in the United States, established in 1956. This challenging mountain race covers the classic marathon distance of 26.2 miles, starting in Manitou Springs and ascending to the summit of Pikes..

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 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..

The Sawatch Ascent is a challenging 50k running event set in the stunning Colorado mountains, taking place on September 28, 2025. Starting and finishing at the base of Mount Princeton, participants will experience a significant elevation gain of 7,000 feet, reaching a high point of 13,150 feet. The..

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, is a community-focused outdoor event offering various trail running options, including a 5K, 10K, half marathon, and a 50K ultramarathon. Participants can explore the scenic trails of Philip S. Miller Park and Ridgeline Open Space, with..

The Rim to Rim Royal Gorge Races is an exciting running event featuring a 5K road run, an 8-mile trail run, and a half marathon trail run, all set against the stunning backdrop of the Royal Gorge Bridge in Canon City, Colorado. Participants will experience challenging terrains and breathtaking views..

The Bear Chase Race is an endurance trail running festival held at Bear Creek Lake Park in Lakewood, Colorado. It offers multiple race distances including 100K, 50 Mile, 50K, Half Marathon, 10K, and 5K, catering especially to first-time ultramarathoners and trail runners. The course features mostly..

The Above the Clouds Ultra is an annual trail running event held in Woodland Park, Colorado, known as the "City Above the Clouds." It features two race distances: a 50K ultra and a 10K. The course showcases stunning Colorado fall colors and offers fast, flowing singletrack trails around Rampart Rese..

The Pikes Peak Road Runners Fall Series is a challenging cross country trail running event held in Colorado Springs, Colorado. It features four races of increasing distances—3.8 to 7.4 miles—across diverse city and county parks including Bear Creek Terrace, North Monument Valley Park, Piñon Valley P..

The Blue Sky Trail Marathon and Half Marathon are scheduled for October 18-19, 2025, in Fort Collins, Colorado. The event features a scenic course through trails between Horsetooth Mountain Park and the Devil’s Backbone Open Space, offering a mix of dirt singletrack, rocky terrain, and gravel paths...

The Great Trailhead Foot Race 10 Miler, held at Bear Creek Lake Park in Lakewood, Colorado, offers runners a scenic trail experience with single-track dirt paths against the backdrop of Denver's skyline. Participants can choose between a 5-mile or a challenging 10-mile double-lap course. Registratio..

The Indian Creek Trail Runs, part of the Human Potential Running Series, is an annual fall trail running event held at Indian Creek Campground in Sedalia, Colorado. Celebrating its 12th year, it offers multiple race distances: 5-Mile, 15-Mile, 55k, and 50-Mile, with time limits of 12 to 14 hours dep..