Trail Running calendar near Brighton 2024-2025

The Rattler Trail Race, held in Colorado Springs, features a stunning course through Palmer Park, showcasing breathtaking views of the city and Pikes Peak. Participants can choose from three race distances: 50K, 25K, and 10K, making it accessible for various skill levels. The event emphasizes the be..

The Greenland Trail Races, held annually in May at the Greenland Open Space in Larkspur, Colorado, offers participants a choice of four distances: 4M, 8M, 25K, and the 50K, which is recognized as Colorado's fastest 50K. The event features a scenic course that traverses diverse landscapes, including ..

Niwot's Challenge is a challenging ultramarathon held annually in Colorado's Front Range, designed for experienced runners. Modeled after the Barkley Marathons, this event features a secretive course that requires participants to navigate primarily off-trail using a map and compass. With a limited c..

Samson's Revenge is a trail running event held at the YMCA of the Rockies in Estes Park, Colorado, honoring the legacy of Samson, a famous elk poached in 1995. Participants can choose from three distances: 10K, 27K, and 55K, featuring a challenging course with a King of the Mountain segment. The eve..

The Endure Trail Runs, hosted by the Human Potential Running Series, takes place at Mueller State Park in Divide, Colorado, from May 17 to May 18, 2025. This unique event features a variety of races, including a 10k, Half Marathon, and timed challenges of 12 and 24 hours. Participants in the 12-Hour..

The Ol' College Try 24 Hour Ultra is Denver's inaugural 24-hour ultra race, taking place at Auraria Campus on May 24-25, 2025. Hosted by Rise Again Running Events in collaboration with Tall Tales Ranch, this event invites runners of all levels to challenge themselves in a non-stop race environment. ..

The Crazy Legs 10K+ Trail Run is an exciting running event taking place at Devil’s Backbone Open Space in Loveland, Colorado. This trail run features a challenging course marked by flour arrows, with hydration stations provided by volunteers. Participants can enjoy a unique experience, including the..

The Great Divide Ultra is a premier trail running festival held in Divide, Colorado, featuring a variety of race distances including 100 miles, 100K, 50K, and 25K events across the scenic landscapes of Mueller State Park. Known for its stunning views and smooth single/double-track trails, the event ..

Estes Park's Backyard Ultra is a unique ultra-running event set against the stunning backdrop of Lake Estes, Colorado. Participants must complete a 4.252-mile loop every hour until only one runner remains, who is declared the winner. The event supports Childcare and Family Services in Estes Park, ma..

The Timberview Trail Run is an exciting annual event held at Lory State Park in Colorado, featuring three race distances: 5K, 5 miles, and 10 miles. Scheduled for June 28, 2025, this trail run offers a scenic experience with views of Horsetooth Reservoir and the surrounding foothills, making it suit..

The Silverheels Trail Runs is an annual running event held in Como, Colorado, featuring a variety of distances including 100-mile, 100k, 60k, 50-mile, 18-mile, and 10-mile races. Set against the stunning backdrop of Colorado's Front Range, the courses traverse high alpine meadows, ghost towns, and o..

The Summit 200 is an extraordinary 200-mile ultra-running event set in the breathtaking landscapes of Summit County, Colorado. This challenging race features a single-loop course that reaches altitudes between 9,000 and nearly 13,000 feet, with a total elevation gain of approximately 40,000 feet. Li..

The Lory Summer Trail Series, taking place in August 2025 at Lory State Park in Fort Collins, Colorado, features a series of midweek trail races designed for both novice and experienced runners. Participants can choose from distances of 5K, 10K, and 12K, with a focus on creating a fun and low-key at..

The Pikes Peak Ascent and Marathon is a renowned running event held annually in Manitou Springs, Colorado. Established in 1956, the Marathon is the oldest continuously held marathon in the U.S., featuring a challenging course that ascends to the summit of Pikes Peak at 14,115 feet and back down, cov..

The Red Feather Trail Jamboree will take place in Red Feather Lakes from Saturday 20 September 2025 to Monday 22 September 2025. You can run between 13 and 50 miles.