Trail Running Calendar Colorado 2025-2026

Take on the Collegiate Peaks Trail Run in Buena Vista Colorado with 25 or 50 mile options through stunning high country. Mark the 36th anniversary with a memorable mountain trail challenge.

Valkyrie Trail Race is a women focused spring trail festival at Cheyenne Mountain State Park near southern Colorado Springs, with multiple distances from 4 miles to 50K. Expect climbs, singletrack and technical rocky descents for a scenic,..

Adventure Fest in Fruita CO on May 9 and 10, 2026 is a two day outdoor celebration of trail and gravel racing, clinics, guided canyoneering, kids races and lively evening events. Camp at the trailhead and enjoy post race bonfires and commun..

Take on scenic singletrack loops near Fort Collins, Colorado, with 25 miles or 50 miles of rugged high country and big vertical gain. Expect technical trails, sweeping views and occasional wildlife encounters.

Run the Fruita Trail Half Marathon through the North Fruita Desert, a scenic single loop of 13.8 miles with roughly 1000 feet of climbing and sweeping views of buttes and mesas. Expect flowy singletrack, technical climbs and lively aid stat..

Ram Party Trail Runs brings scenic mountain trails around Rampart Reservoir to Buffalo Lodge in Colorado Springs, with distances from 15K to 55 mile for every kind of runner. Expect high country climbs, aid stations, and finisher awards.

Tackle scenic single track on the slopes of Mt Sopris near Carbondale, Colorado with point to point 10 mile and 25k races finishing at Rock Bottom Ranch in Basalt. Expect steep climbs, flowing descents and lively trail festival energy.

Celebrate Memorial Day weekend with the Spirit Trail Race in Buena Vista, Colorado, a scenic trail event with marathon, half marathon and 9k options. Start in town square, enjoy Paddlefest fun, and support local nonprofits.

Join Pyro's Push It Up River Trail Run on Memorial Day in New Castle for a scenic riverside challenge that honors a fallen hero. Choose a family friendly 3.5 km or a hill testing 7.7 km onsite or run virtually from anywhere.

Run the North Fork 50 Mile or 50K on scenic singletrack around Buffalo Creek, Colorado. Choose your distance, enjoy aid stations and a festive finish, and support the North Fork Volunteer Fire Department.

Run the Summits Trail Runs on June 6, 2026 at Granby Ranch Resort, Colorado, with options from a 6 mile to a challenging 50k. Experience single track trails, alpine meadows, and big climbs in a limited field for an intimate mountain race.

Explore high alpine loops at Mueller State Park on June 6 and 7 for the Great Divide Ultra, with distances from 25k to 100 mile and night run options for 25k and 50k. Scenic views, supportive aid, and standout finish swag await.

Aiden's Adventure 5K on June 6 in Colorado Springs is a family friendly run and kids dash honoring Aiden while benefiting local charities. Enjoy scenic trails, free shirts for early registrants, carnival games and food trucks.

Mace's Hideout 100/50 is a June mountain trail race in Colorado's Wet Mountains offering 100 mile and 50 mile options. Runners cross alpine meadows to dry piñon for sweeping views on a route tied to a historic local hideout.

Hit the scenic Devil's Backbone trails for the Crazy Legs 10k+ Trail Run on June 7, 2026, a looped course with rugged singletrack and friendly aid. Expect classic small race vibes, volunteer support, and stunning Colorado views.

Run scenic dirt trails around Barr Lake State Park on June 13, 2026, with distances from 5K to 50K to suit every trail runner. Enjoy open Front Range views, gentle elevation and aid stations on the longer courses.

Run into summer at the San Juan Solstice 50 Mile, a scenic trail challenge crossing wild high country on June 20, 2026. With a limited 300 spots and lottery entry, this is a soulful test of endurance and scenery for adventurous runners.

Experience classic Colorado singletrack in Garden of the Gods and Pike National Forest on June 20, 2026 with 100K, 50K and 35K options. Expect big climbs, stunning views and full aid station support.

Race in the Clouds Alma Dirt Festival runs June 25 to 28, 2026 in Alma, Colorado at 10,600 ft. Mountain biking, trail runs, an off road duathlon, youth races and meadow camping offer high country climbs and single track thrills.

Experience The John Cappis, a free mountaineering jaunt near Silverton Colorado on June 27, 2026. This rugged off trail challenge uses a changing route and checkpoint scoring so every mile you reach counts toward the finish.