Trail Running calendar near Frisco 2025-2026

Experience alpine single track through meadows and forests at Granby Ranch Resort on June 6, 2026, with distances from 6 mile to 50k. Test your limits in the Elevation Challenge where repeated loops add to your total climbed elevation.

Run scenic ridgelines and singletrack at Devil's Backbone in the Crazy Legs 10k+ Trail Run, then celebrate with awards at Loveland Aleworks. Entry includes a hat with a random patch and aid near mile 3, and parking passes are required.

Run scenic dirt trails around Barr Lake State Park, with continuous lake and Front Range views. Distances range from a 5K up to a challenging 50K, with looped courses, aid stations on longer laps and a cupless race policy.

Run high alpine trails above Leadville, Colorado on June 27, 2026, with a rugged marathon and a shorter Heavy Half reaching Mosquito Pass at 13,185 feet. Expect old mining roads, stunning mountain views and a true high country challenge.

Race in the Clouds at Alma Cemetery Meadow is a high country weekend of mountain bike, trail and off road duathlon racing at 10,600 feet. Multiple distances, youth events and on site camping create a true alpine festival vibe.

Run under the full moon on Highlands Ranch trails in Chase the Moon, an overnight looped endurance event offering 12, 6 and 3 hour solos plus 50K and team relays. Enjoy scenic dirt trails, aid stations, and a festive night race atmosphere.

Silverheels Trail Runs in Como Colorado offer high elevation trail races from 10 to 100 miles through aspen groves, creeks, and historic mining country. Expect alpine views, tough climbs, and true mountain ultrarunning.

Experience Leadville's Silver Rush weekend in July 2026 with a rugged 50 mile out and back, a 15 mile option and a juniors 5K, plus a combined run and bike challenge. Enjoy high alpine views, big elevation and well stocked aid.

Grin & Bear It brings rugged trail running and mountain biking to downtown Crested Butte with scenic high alpine loops and steep climbs. Pick a longer mountain route or a shorter out and back, then refuel with a post race brunch at the Nord..

High Lonesome 100 is a rugged 100 mile mountain loop in Colorado, crossing five alpine passes and sections of the Continental Divide and Colorado Trail. Mid July racing delivers big climbs, sweeping alpine views, and a true endurance test.

Three days of high alpine trail running around Leadville, Colorado crossing the continental divide from Hope Pass to Red Cliff with stunning fourteener views. Choose Full Pint or Half Pint stages, enjoy on site camp life with live bands, sh..

Experience high alpine trails from Gould Colorado in the Never Summer range with 100 km and 60 km options. Rugged singletrack, big climbs and alpine lakes await for a true mountain adventure.

Take on the Summit 200, a breathtaking 200 mile loop around Summit County, Colorado that climbs above 12,700 feet and delivers about 40,000 feet of gain. Expect remote high altitude single track, sparse aid and an epic endurance challenge.

Sheep Mountain Trail Runs in Fairplay Colorado offers 50 mile, 50k and half marathon courses across technical singletrack and alpine roads averaging over 10,600 ft. Expect sweeping mountain views, tough terrain and variable August weather.

Take on Aspen Backcountry with 50K, marathon or heavy half routes from Rio Grande Park, mostly on scenic dirt trails and high alpine terrain. After the finish enjoy the Duck Derby festival with live music, food and local vendors.

Run the Rockies Trail in Frisco, Colorado is a scenic 5k, 10k and half marathon on single track and dirt roads with views of Dillon Reservoir and the Ten Mile Range and a lakeshore finish. The half gets new single track in 2026.

The Leadville Trail 100 Run is a legendary 100 mile ultramarathon in the Colorado Rockies that tests runners at high altitude with climbs to Hope Pass and sweeping mountain trails. Iconic belt buckles await finishers who make the 25 or 30 h..

Experience scenic high altitude trail running in Fraser, Colorado at the Byers Peak Stampede Half Marathon and 5K, a fundraiser for the Shining Stars Foundation. Tackle a challenging half above 9,500 ft or enjoy a dirt road 5K.

Choose from 50K, 25K, 10K or 5K on rolling singletrack and multiuse trails with sweeping views at Philip S. Miller Park in Castle Rock, Colorado. Portions of proceeds support Castle Rock open space and local charities.

Front Range Ultra Dayze invites ultrarunners to a multi day looped trail festival along River's Edge in Loveland, Colorado, offering timed and distance events from 12 hour to 200 mile. Enjoy scenic two mile loops, around the clock aid, camp..