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
Trail running and hiking in Marble, Colorado featuring a 25K loop, an 8 mile Quarry Climb, and a 2.5K kids run with post-race BBQ and beer.
Social trail run at Lory State Park on September 13 with multiple distance options, followed by coffee and bagels; a State Park Pass is required.
Two trail ultramarathons in Steamboat Springs covering 50 and 100 mile courses across Buffalo Pass, Mount Werner, and Rabbit Ears with a $100,000 purse and community giving.
Experience a 13 mile trail run with 4180 feet of elevation gain through the scenic San Juan Mountains to support outdoor education for local students.
Experience the scenic mesa trails of North Table Mountain in Golden with 5 or 10 mile races that support families working to overcome homelessness.
A 13.32 mile ascent from Manitou Springs to the summit of Pikes Peak with about 7,867 ft of elevation gain on September 19, 2026.
A 5 km fundraiser in Telluride supporting the Telluride Adaptive Sports Program. The downtown route climbs the river trail past Bridal Veil Falls and returns to Elks Park, finishing with live music, free beer and yoga.
5K and 10K races through Beulah Valley with mixed pavement and dirt courses, start and finish at Beulah School; 20% of proceeds support local fire recovery.
Community 5K, 1 mile fun run and a dog friendly 3.1 mile course on Second Creek Trail supporting Every Child Pediatrics in Commerce City on 09/19/2026.
Experience a 26.2 mile mountain run from Manitou Springs to the summit of Pikes Peak and back. This historic event features over 7800 feet of elevation gain and a 10 hour time limit.
Grass cross-country at Exposition Park on Sep 20, 2026 with youth and open races featuring creek crossings, bale jumps, and a wooden footbridge.
Experience the wild spaces of Northern Colorado with a weekend of trail races ranging from a half marathon to a 50 mile ultra through scenic forests and scout camp trails. Stay on site with available camping and community meals.
Experience the wild beauty of the Southern Colorado Rocky Mountains at Music Meadows Ranch. Choose from several trail distances ranging from 8 miles to 104 miles along the scenic Rainbow Trail.
Trail ultramarathon in Crested Butte, Colorado with 35K, 55K and 50 mile routes through Gunnison National Forest and significant elevation change.
Experience desert style single track and forest roads with views of the Collegiate Peaks in Buena Vista. Choose between 50k or 30k distances as part of the multi sport 14er Fest.
Tough Mudder Colorado at Fort Carson on September 26, 2026: 15K and 5K routes with 12 to 20+ obstacles, finisher medal, shirt, headband, and Mudder Village spectator pass.
Push your limits on a 0.82 mile loop at 7,240 feet in this community focused 24 hour endurance run in Palmer Lake, Colorado.
Experience two days of mountain endurance in Colorado with technical mountain bike and trail running races including a 50K ultra and the 100K Epic Double challenge.
A high altitude trail half marathon near Telluride on September 26, 2026, covering about 13 miles of mostly singletrack through aspen woods, finishing in town with stocked aid stations and required alpine gear.