Trail Running calendar near Estes Park 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 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 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.

Experience the scenic single track trails of Steamboat Springs during the Emerald Mountain Trail Run. Choose between the 4 mile or 12k distances through aspen groves to support the local Boys and Girls Club.

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..

A six-hour trail challenge in Littleton where runners complete a 5K each hour for six hours, totaling 18 miles if completed. Trail terrain, hourly elimination, tiered patches and medals, and national leaderboard prizes highlight the format.

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.

An annual trail running event in Sedalia, Colorado offering 50-mile, 55k, 15-mile and 5-mile courses through montane forests, aspens, and red rock viewpoints, with limited camping, aid stations, and specific mid-race drop down and pacer rul..

Trail marathon and half at Horsetooth Mountain Park on mostly singletrack and redstone hardpack. Two distances with published elevation gain, fully stocked aid stations, drop bag options, and time allowances.

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.

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.

A timed 6, 12, and 24 hour event on a certified one mile dirt loop at Swift Ponds in Fort Collins, featuring full aid, medical coverage, relay options and a registration cap of 300.

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.

A winter trail race at Staunton State Park offering 50k, 16-Mile, and 8-Mile options, limited to 250 runners, with mountain terrain, variable winter weather, and on-course aid stations.

A long-distance event along the Poudre River Trail on April 11, 2027, offering 50 mile and 100 mile solo and relay options through Fort Collins, Timnath, Windsor and Greeley. The course is supported with aid stations, exchange zones and fin..

Trail races near Fort Collins offering 25 and 50 mile options on mostly singletrack through Lory State Park and Horsetooth Mountain Park, featuring about 5,500 ft or 11,000 ft of vertical gain, staffed aid stations, and marked trails.