Colorado
Colorado Trail Running Calendar 2026-2027
Explore the best trail runs in Colorado for 2026-2027! Our updated list features 149 exciting trail runs across the region. Find your next trail run in Colorado below and join the trail community at these great events!
September 2026
Experience a point to point trail race from Vail to Minturn with technical singletrack, golden aspen groves, and stunning views of Mount of the Holy Cross.
Experience the changing aspens on a 5K trail run through Breckenridge followed by a festive Oktoberfest celebration at Blue River Plaza.
A cross-country meet at Reservoir Hill in Pagosa Springs with middle school 3K and high school 5K races on hilly forest roads and single-track trails. Ribbons go to the top 10 and team awards for top high school teams.
Run a 12.2 mile trail course that climbs to the mountain summit and back down through the scenic single track of Purgatory Resort.
A six hour trail challenge of repeating a 5K loop each hour; finish all six to earn the OUTLAST medal and a place on the national leaderboard.
Trail races in Pagosa Springs on September 26, 2026 offering 5 km and 10 km on a scenic loop plus a green chile festival afterward.
A high alpine 50K in Nathrop Colorado featuring about 7,000 feet of climb to 13,150 feet, extensive singletrack, staffed aid stations, and an 11 hour cutoff.
Fall trail event in Buena Vista, CO offering a 14K with over 500 feet elevation gain and a 5K through Buena Vista River Park and Vendor Village.
Fourth annual pack burro race at Greenland Open Space in Larkspur, Colorado offering 8 Mile and 3 Mile trail events with strict burro welfare and equipment rules.
October 2026
A trail running event at Hartman Rocks in Gunnison, Colorado on October 3, 2026 offering 50K, 28K and 15K over slickrock, singletrack and doubletrack terrain.
A trail race weekend in Lakewood CO offering distances from 5K to 100K on mostly singletrack dirt trails with aid stations, drop bags, and looped course formats.
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.
Fall trail races in Woodland Park, CO featuring 50k and 10k courses around Rampart Reservoir with big Pikes Peak views and well stocked aid stations.
A point-to-point trail marathon and 30K through Colorado’s North Fork Valley with a big climb to Inter-Ocean Pass; all proceeds fund Nature Connection summer camp scholarships.
A last person standing backyard ultra on a 4.17 mile singletrack loop at the 18 Road trail system in Western Colorado, scheduled for October 3, 2026.
Experience scenic road and trail races through the foothills of Canon City with a memorable crossing of the Royal Gorge Bridge.
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.
Castle Rock trail festival with a family adventure run and races from 5K to 50K on Philip S. Miller Park and Ridgeline Open Space.
A scenic 5K through Estes Park during Elk Fest with shuttle transport from the Visitor Center and a finish at Performance Park.
Trail races in Louisville CO with 5k, 10k, a new half marathon and a family Pretzel Mile plus an Oktoberfest post race festival.