Trail Running calendar near Eaton 2025-2026

Devil on the Divide is a challenging trail running event held in Empire, Colorado, featuring 50K and 22K point-to-point courses. Set against the stunning backdrop of Clear Creek County and the Continental Divide, the race offers breathtaking views and high-altitude terrain, with the 50K course reach..

The Jelm Mountain Run, held in Southeast Wyoming near Jelm Mountain, offers two challenging distances: a 10+ mile out-and-back course and a 50k race that covers the 10-mile route three times. The course features rugged jeep roads with over 2,000 feet of elevation gain, starting at 7,600 feet and cli..

The Ned Ned Half Marathon is a long-standing trail running event held in Nederland, Colorado, a picturesque mountain town at 8,236 feet elevation. Celebrating over 43 years, the race features a challenging 13.3-mile half marathon with 1,408 feet of elevation gain, traversing dirt roads and single-tr..

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

The Red Feather Trail Jamboree is a three-day trail running event held at Ben Delatour Scout Ranch in Red Feather Lakes, Colorado. Scheduled for September 26-28, 2025, it offers three race distances: a 50-mile ultra with 8,500 feet of elevation gain, a 50K with 4,200 feet gain, and a half marathon f..

Rocky's Backyard Ultra is a unique ultra trail race held at the YMCA of the Rockies in Estes Park, Colorado, known as the highest organized Backyard Ultra in the world. Runners complete 4.167-mile laps on a challenging singletrack course featuring about 500 feet of elevation gain and loss per lap, w..

The Bear Chase is a trail running endurance 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 to both first-time ultramarathoners and experienced trail runners. The course features mostly..

The Blue Sky Trail Marathon & Half Marathon, held in Fort Collins, Colorado, offers a scenic and challenging trail running experience through Horsetooth Mountain Park and Devil’s Backbone Open Space. The marathon covers 26.7 miles with 3,500 feet of elevation gain, while the half marathon spans 13.4..

The Indian Creek Trail Runs, part of the Human Potential Running Series, is an annual trail running event held at Indian Creek Campground in Sedalia, Colorado. Known as the "Fall Classic," it features scenic and challenging courses through seldom-used single-track trails in the Denver Metro area, tr..

The Great Trailhead Foot Race 10 Miler takes place at Bear Creek Lake Park in Lakewood, Colorado, offering 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. Reg..

Beware The Bear Trail Races take place at Bear Creek Lake Park in Lakewood, Colorado, offering 5km, 15km, and a combined 5+15km double race, along with a 1km kids' run. The courses feature mostly dirt trails with a mix of single and double tracks, incorporating short steep hills, rollers, and varied..

The Colorado 24 Hour Run, held in Fort Collins, Colorado, offers a unique endurance running experience on a scenic, flat one-mile dirt loop. Participants can challenge themselves in various timed events including 6, 12, and 24-hour runs, as well as relay options for each duration. The course is desi..

The BINGO! Trail Party is a unique trail running event held at May Farms in Byers, Colorado. It offers multiple distance levels ranging from 6 to 54 miles, with a distinctive bingo-style format where runners complete loops and mark numbers on their bibs based on bingo balls drawn after each loop. Th..

The HRCA Backcountry Wilderness Half Marathon is an annual 13.1-mile trail race held in Highlands Ranch, Colorado, featuring a scenic single-loop course through the Douglas County East/West trail and the Backcountry Wilderness Area. The race offers a challenging route on dirt, gravel, and singletrac..

The Louisville Trail Race, held annually in Louisville, Colorado, features a half marathon, 10K, and 5K race along scenic trails near the iconic Flat Irons. The courses are mostly dirt trails with some bike paths, offering a mostly flat terrain with challenging hills that provide stunning views of t..

The Thumbs Up Vertical Challenge is an 8-hour ascent race held in Estes Park, Colorado, on the Thumb Open Space trail. Participants repeatedly run a 1 km out-and-back course with a 540-foot elevation gain per ascent. Runners collect poker chips at the turnaround point to track their completed ascent..

The USCSA Cross Country Ski Racing Festival, held at Snow Mountain Ranch Nordic Center in Granby, Colorado, is a vibrant collegiate and junior skiing event scheduled for January 24-25, 2026. It features classic races of 15 km and 7.5 km for college and independent high school athletes, alongside CHS..

Run the Ranch is an annual trail running event held at the scenic Sylvan Dale Guest Ranch in Loveland, Colorado. The race offers a variety of distances including 5K, 10K, and timed trail runs of 4, 6, and 12 hours, with options for solo runners and 4-person relay teams. Participants run on private r..

Niwot's Challenge is a unique, invitation-only endurance event held annually near Sedalia, Colorado, along the South Platte River in the Front Range. Unlike typical races, it emphasizes self-reliance, navigation, and mental toughness over speed. The course is a secret, off-trail gauntlet requiring m..

The Summits Trail Runs, held at Granby Ranch Resort in Colorado’s Rocky Mountains, offer a challenging series of trail races with distances from 6 miles to ultra distances including a 50k and a 12-hour Elevation Challenge. The courses feature rugged alpine terrain, single-track trails, alpine meadow..