Trail Running calendar near Winter Park 2025-2026

The Frederick Pack Burro Race is an annual 10K event held in Frederick, Colorado, celebrating the town's Miners Day heritage. The race follows a scenic course starting downtown at Fifth and Oak Streets, heading north along a trail through a tunnel to the Frederick Recreation Area, looping around Mil..

Red Feather Trail Jamboree is a three-day trail running weekend near Red Feather Lakes, Colorado, hosted at the Ben Delatour Scout Ranch and surrounding National Forest. The event features three main races: 50-mile (≈8,500 ft gain), 50K (≈4,200 ft gain), and Half Marathon (≈1,700 ft gain), plus a 3-..

The Emerald Mountain Trail Run takes place in Steamboat Springs, Colorado, offering two race distances: a 12k (approximately 7.75 miles) and a 4-mile run. The scenic course starts at the base of Howelsen Hill and winds through aspen-lined single-track trails on Emerald Mountain. The event welcomes h..

The West Line Winder is a scenic trail running event held in Buena Vista, Colorado, featuring two race distances: a 50K (30.6 miles) with 4,000 feet of ascent and a 30K (18.1 miles) with 2,080 feet of ascent. The courses traverse buttery singletrack trails, forest roads, and some paved sections, set..

Golden Leaf Half Marathon, presented by ACG, is the bucket-list race hosted by the Ute Mountaineer and the City of Aspen. The half marathon (approximately 13.1 miles) starts at Fanny Hill in Snowmass and follows the Government Trail through scenic Aspen groves, finishing at Koch Lumber Park in downt..

Estes Epic is a multi-event trail challenge held in Estes Park, Colorado. The weekend features a 50k bike race, a 50k trail run, a Heavy Half Marathon, and the all-in Epic Double (50k MTB and 50k Run). After a six-year break, the race returns with remote, rugged terrain, single-track trails, steep c..

24 Hours of Palmer Lake is a 24-hour ultramarathon held in Palmer Lake, Colorado, on a 0.82-mile loop atop the Palmer Divide at about 7,240 feet elevation. The event is described as a low-fanfare, community-driven affair, welcoming runners who want to push mental and physical limits in a mountain se..

14er Fest is a fall trail-running event in Buena Vista, Colorado, featuring two races: an 8.7-mile (14K) course and a 3.1-mile (5K) course. The 14K starts in Buena Vista River Park, crosses the Arkansas River, and climbs the Midland Hill Trail System for over 500 feet of elevation gain, offering pan..

The Above the Clouds Ultra takes place in Woodland Park, Colorado on October 4, 2025. The event offers the following distances: 50k 10k Registration closes on October 1, 2025. Registrations include a gender-specific race shirt, personalized bib and finishers’ award, access to aid stations, and a..

Rocky’s Backyard Ultra is held at the YMCA of the Rockies Estes Park Center in Estes Park, Colorado. Runners must complete 4.167 miles in under one hour each lap, with the field reduced to a single finisher as the race continues until no others remain. The course loops around the boundary of RMNP on..

The Bear Chase Race Endurance Festival unfolds at Bear Creek Lake Park in Lakewood, Colorado, and offers six races: 100K, 50 Mile, 50K, Half Marathon, 10K, and 5K (with a Baby Bear 10K variant). The mostly dirt, single-track course is described as fast by trail standards and not overly technical, wi..

The Castle Rock Trail Festival / liveBIG Run is a trail running and walking event on the Ridgeline trail system in Castle Rock, using Philip S. Miller Park and Ridgeline Open Space. The event includes a family obstacle run for children ages 5 to 12 and longer trail races for adult participants. Par..

Suffer Better Fall Trail Runs take place at Staunton State Park, just off Highway 285 near Conifer, Colorado. The event offers four distances: 50K, 25K, a 25K FishSlappers edition, and a new 5K. The course showcases CO’s best trails—lovely, flowing singletrack with significant vertical gain (roughly..

Rubey Rescue Run is a 5K uphill trail race held in Aspen, Colorado. The course climbs Buttermilk Mountain, starting near the base at Buttermilk Mountain Lodge and gaining about 1,700 feet to the Cliff House, offering a timed competition and sweeping views of the Maroon Bells. Participants may run wi..

Boulder XC Series Meet 1 is a family-friendly cross-country event held at Valmont City Park (South) in Boulder, Colorado (5110 Valmont Rd). The meet offers three distances: 1K for younger runners, 3K for those up to 16, and a 5K open race, welcoming participants of all ages and abilities. It’s the f..

The Indian Creek Trail Runs is scheduled for Saturday, October 18, 2025, at Indian Creek Campground in Sedalia, Colorado. The event includes the following distances: 50-Mile 55k 15-Mile 5-Mile Combined runner capacity is 225. Time limits are 14 hours for the 50-Mile and 55k, and 12 hours for the..

The Great Trailhead Foot Race takes place at Bear Creek Lake Park in Lakewood, Colorado, with 5- and 10-mile trail options. Runners tackle single-track and dirt trails in the shadow of Denver's skyline, with the 10-mile course as a double lap to the finish line party. Start and finish are at the Pel..

The Blue Sky Trail Marathon & Half takes place October 18 (Marathon) and October 19 (Half), 2025, in Fort Collins, Colorado. The races run on trails between Horsetooth Mountain Park and the Devil’s Backbone Open Space along the easternmost hogbacks of the Front Range. Elevation on course ranges..

Beware The Bear Trail Races take place at Bear Creek Lake Park in Lakewood, Colorado. Organizers offer four options: a 5K, a 15K, a 5K+15K Double, and a Kids 1K. The mostly dirt courses feature single and double-track trails with short, steep climbs, rollers, and mixed terrain designed as a friendly..

Colorado 24 Hour Run takes place in Fort Collins, Colorado, at 4927 E. County Road 36. The event offers multiple distance options: 24-hour, 12-hour, and 6-hour races, plus 24-hour, 12-hour, and 6-hour relays.Runners complete laps on a one-mile dirt loop—the flat, scenic loop you’ll find in Colorado—..