Trail Running calendar near Frisco 2026-2027

A two-day trail and bike event in Estes Park featuring 31-mile bike and run options, a 15-mile heavy half, and a 62-mile duathlon, with rugged trails, significant climbs, and aid stations supporting competitors.

A scenic half marathon from Fanny Hill in Snowmass along the Government Trail through Aspen groves to Koch Lumber Park in downtown Aspen. Registration opens April 28, 2026; in store $80, online $105.

A point to point trail race from Vail to Minturn with 26K and 14K courses across Vail Mountain. Both routes feature alpine singletrack, scenic views of Mt. Holy Cross, staffed aid stations and a post race lunch voucher.

A *5K* trail run on Town of Breckenridge Trails that finishes at Blue River Plaza on Main Street during Breckenridge Oktoberfest. Field limited to 300 runners; first 250 registrants receive a long-sleeve technical tee and 21+ entrants get a..

A high alpine 50k near Mount Princeton in Nathrop, Colorado, featuring 7,000 ft of climbing and a 13,100 ft high point. The course follows Chalk Creek Canyon and the Colorado Trail through ponderosa and aspen forests to an alpine plateau.

A fall trail event in Buena Vista, Colorado on September 27, 2026 offering a 14K trail race with over 500 feet of elevation gain and a 5K along the Arkansas River. Both races start and finish at Vendor Village near the Eddyline Beer Garden.

A weekend trail running festival at Bear Creek Lake Park offering 100K, 50M, 50K, half marathon, 10K and 5K on mostly singletrack terrain with looped courses, aid stations, drop bags, and controlled crew and pacer rules.

Experience the scenic HRCA Backcountry Wilderness Area with trail races for the whole family. Enjoy rolling hills and open views followed by a pancake breakfast and finisher medals for all participants in Littleton.

A Woodland Park trail event featuring 50k and 10k options on singletrack and forest roads with views of Pikes Peak, stocked aid stations, and crew access for the 50k.

Trail races on Emerald Mountain near Howelsen Hill offering a 12k about 7.75 miles and a 4 mile option over aspen-lined singletrack. Awards and series prizes are presented at Olympian Hall after the race.

A multi distance trail festival in Castle Rock featuring a family adventure run plus 5K, 10K, half marathon and 50K ultramarathon across Philip S. Miller Park and Ridgeline Open Space. Events include chip timing, finisher medals and aid sta..

Two marked trail courses start and finish at Camp 4 Coffee in Crested Butte South. Routes are 10.04 and 19.26 miles over single track, dirt and some paved road; the event is fully self-supported on Gunnison National Forest land.

A Halloween themed 3.1 mile trail run in Aspen with dogs welcome, timed results and cash prizes for top male and female finishers. The event features costume prizes, raffle items and food trucks, with proceeds benefiting the local animal sh..

A fall trail race at Staunton State Park offering 50K, 25K, a 25K FishSlappers division, and a steep 5K, run on runnable singletrack with aid stations and fundraising for land and water conservation.

Trail races at Indian Creek Campground near Sedalia, CO offering 50 mile, 55k, 15 mile and 5 mile routes through montane forest and red rock scenery with limited entries and defined time limits.

Trail races at Bear Creek Lake Park offering 5 miles or a two-lap 10 miles on single-track dirt. Registration includes park admission, a finisher meal and refreshments; 10 mile finishers receive a commemorative mug.

Methodist Mountain Ultra The Methodist Mountain Ultra (MMU) is a trail race set on the Methodist Mountain trail system near Salida, Colorado. It takes place at the northern end of the Sangre de Cristo mountains. The event features two dista..

Trail races at Bear Creek Lake Park in Lakewood CO offering 5 km, 15 km, a 5 plus 15 double, and a kids 1 km with a stuffed bear for finishers. Courses are mostly dirt, single and double track, and fully marked.

Experience 13.1 miles of singletrack trails and hills in the Highlands Ranch Backcountry Wilderness Area. Enjoy custom medals and a post race pancake breakfast while competing for cash prizes in various categories.

Trail races of 13.1 miles, 10K, and 5K run on dirt trails around Louisville Community Park with a notable hill offering views of the Flat Irons. The event includes aid stations, drop bag service, and post race festivities.