Trail Running calendar near Longmont 2026-2027

Join a family friendly trail event in Aurora featuring 5K distances and a kids run. Enjoy dog demonstrations, a pancake breakfast, and a kids fun zone while supporting therapy and patrol K9 units.

Event Overview The Front Range Ultra Dayze (FRUD) is a multi-day running festival taking place in Loveland, Colorado. It features a variety of ultra-distance and timed events, with a total participant cap of 200 runners. Distances and Forma..

A mountain trail race at Arapahoe Basin on September 5, 2026 covering *9.4 miles* and *2,211 ft* of ascent, with Sport, Expert and Pro divisions, a 700 runner cap, on course aid stations and category prizes.

The American Heroes Run takes place on September 11 and 12, 2026 in Longmont, Colorado. Participants can run various distances on a flat, fast loop course. The event honors American heroes with special awards and a patriotic theme.

Experience trail and road running at 8,236 feet in Nederland, Colorado. Choose between a trail half marathon, a 10K, or a family friendly 5K while supporting local youth programs.

Experience high altitude trail running at the Snow Mountain Ranch Trail Running Festival in Granby. Choose from distances ranging from 5 km to 50 km on scenic dirt and grass paths reaching nearly 10000 feet in elevation.

Experience a 13.5 mile trail run through Lory State Park featuring 2,000 feet of vertical gain and technical singletrack. Enjoy panoramic views of the Rocky Mountains followed by a post race pancake breakfast.

Tackle high-altitude trails in the Colorado Rockies. Choose between a demanding 50K or a 22K point-to-point course, both featuring single-track paths and significant climbs. This remote race requires experience and preparation.

Experience the scenic trails of North Table Mountain in Golden with 5 and 10 mile races. Run through challenging switchbacks and loops to support families transitioning from homelessness.

The Red Feather Trail Jamboree is a three-day trail running festival in the Colorado mountains. Runners can choose from a 50-mile, 50K, or half marathon course exploring forests and meadows near Red Feather Lakes. The event features camping..

The Estes Epic returns to Colorado's mountains with trail runs and a mountain bike race. Choose from a 50k run, a heavy half marathon, a 50k bike race, or the ultimate "Epic" double. The event supports the local high school mountain bike te..

Experience a stunning point to point trail race from Vail to Minturn. Run through golden aspen groves and high alpine terrain with distances of 26K and 14K available for up to 250 participants.

Experience the scenic trails of Bear Creek Lake Park at this multi day endurance festival in Lakewood. With distances ranging from a 5K to a 100K ultra marathon, the event features fast non technical dirt paths and panoramic views.

Experience the scenic HRCA Backcountry Wilderness Area with dirt trail races for all ages. Enjoy rolling hills and mountain views followed by a pancake breakfast and finisher medals in Littleton.

Distances and Time Limits The Indian Creek Trail Runs is a multi-distance trail running event offering four options: A 50-mile race and a 55k (approx. 34 miles) race, both with a 14-hour time limit. A 15-mile race and a 5-mile race, both w..

Experience the scenic redstone hardpack of Northern Colorados Front Range mountains. This event offers marathon and half marathon distances on singletrack trails with moderate elevation and generous time limits.

Experience single track and dirt trails at Bear Creek Lake Park with views of the Denver skyline. Enjoy a 5 or 10 mile race featuring park entry, a finisher meal, and a post run party.

Trail races at Bear Creek Lake Park offering 5 km, 15 km, a 5 km plus 15 km double, and a Kids 1 km. Main race registration includes socks or a neck gaiter and a pancake breakfast while kids receive a stuffy at the finish.

Experience a scenic singleloop trail race through the Highlands Ranch Backcountry Wilderness on a course of pure dirt and singletrack. Enjoy hills, mountain views, and a postrace pancake breakfast in Lone Tree.

Experience the scenic beauty of the Front Range at this annual Colorado trail event featuring half marathon, 10K, and 5K distances on mostly dirt paths with views of the Flatirons.