Trail Running calendar near Littleton 2024-2025

The Boulder Rez Marathon is a scenic running event held at the Boulder Reservoir in Boulder, Colorado. Participants can choose from various distances, including a marathon, half marathon, 3/4 marathon, and 10K, all set along dirt roads and trails with stunning views of the reservoir and Rocky Mounta..

The Lory Summer Trail Series, hosted by Gnar Runners, features a series of midweek trail races in August 2025 at Lory State Park, Fort Collins, Colorado. Participants can choose from distances of 5K, 10K, and 12K, designed to cater to both novice and experienced trail runners. The event aims to crea..

The Holy COW Trail Stampede is an exciting running event held in Westminster, Colorado, featuring a 10-mile race and a 5k/10k option. Participants can enjoy a fun and festive atmosphere while supporting the charity partner, Growing Home, which focuses on breaking the cycle of poverty for families in..

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, reaching a peak of ..

The Westminster Night Trail, celebrating its 12th year, invites runners to experience a unique nighttime race around Standley Lake in Westminster, CO. Participants can choose from various distances, including 50K, 35K, Half Marathon, 10K, and 5K, all set on scenic packed dirt trails. The event promi..

The Front Range Ultra Dayze is an exciting ultra-running event taking place in Loveland, Colorado, from August 28 to September 1, 2025. This festival features a variety of ultra-distance races, including 200-mile, 100-mile, and timed events ranging from 12 to 100 hours. Participants can camp for fre..

The Cirque Series at Arapahoe Basin is a thrilling mountain running event scheduled for September 6, 2025. Participants will tackle a challenging 9.4-mile course with an elevation gain of 2,411 feet, starting from the base at 10,780 feet. The route features stunning views and diverse terrain, includ..

The HRCA Wildcat Mountain Trail Races, scheduled for September 6, 2025, in Littleton, Colorado, features a variety of events including a 10-mile race, a 10K, and a Kid's Race. The races take place on scenic dirt trails within the HRCA Backcountry Wilderness Area, offering participants stunning mount..

The Snow Mountain Ranch Trail Race, held at the YMCA of the Rockies in Granby, Colorado, is a scenic trail running festival featuring multiple race distances: 50K, 33K, Half Marathon, 10K, and 5K. Set against the stunning backdrop of the Rockies, participants can enjoy the vibrant fall colors and ch..

The Pikes Peak Ascent and Marathon, established in 1956, is renowned as America's ultimate challenge, featuring the oldest continually held marathon in the U.S. The marathon covers a grueling 26.2 miles from Manitou Springs to the summit of Pikes Peak, ascending approximately 7,800 vertical feet. Th..

The 24 Hours of Palmer Lake is an endurance running event set in the scenic mountains of Palmer Lake, Colorado. Participants tackle a 0.82-mile loop course at an elevation of 7,240 feet, pushing their mental and physical limits over a full 24 hours. The event emphasizes community spirit and personal..

The Bear Chase Race Endurance Festival, taking place at Bear Creek Lake Park in Lakewood, CO, features a variety of race distances including 100K, 50 Mile, 50K, Half Marathon, 10K, and 5K. This event is ideal for both novice and experienced trail runners, offering a mix of challenging terrain and st..

Rocky's Backyard Ultra is an exciting ultra trail running event held in Estes Park, Colorado, at the YMCA of the Rockies. This unique race format challenges participants to complete 4.167 miles every hour until only one runner remains, who is declared the winner. The course features stunning Rocky M..

The Indian Creek Trail Runs, part of the Human Potential Running Series, is a celebrated annual event known as the "Fall Classic." Scheduled for October 18, 2025, it features multiple race distances: 50-Mile, 55k, 15-Mile, and 5-Mile, all set in the scenic landscapes of Sedalia, Colorado. Participan..

The Great Trailhead Foot Race 10 Miler is an exciting running event held at Bear Creek Lake Park in Lakewood, Colorado. Participants can enjoy a scenic 10-mile course featuring single-track and dirt trails, all while taking in views of Denver's skyline. The event includes a post-race celebration wit..

The BINGO! Trail Party is a unique running event organized by the Human Potential Running Series, taking place at May Farms in Byers, Colorado. This event features multiple distance levels, ranging from 6 to 54 miles, allowing participants of all abilities to enjoy trail running in a fun and relaxed..

The Louisville Trail Race, celebrating its 12th year, features a Half Marathon, 10K, and 5K, set against the stunning backdrop of Louisville, Colorado. Known for its scenic trails and welcoming atmosphere, the race offers a mostly flat course with a challenging hill that rewards participants with br..