Trail Running Calendar United States 2026-2027

A community 5K in Hillsborough, NH on September 20, 2026, organized by the Hillsboro Fire Department. The off-road course may be uneven and strollers are not recommended; registration runs March 25 to September 19 with a $30 fee.

A dog-friendly 2K and 5K trail run/walk in Case Creek Valley with race bibs, T-shirts, finisher dog tags, and proceeds supporting the Rock Island County Animal Care & Control Shelter.

Expo Park XC is an old school grass cross-country meet in Aurora, Colorado, featuring creek crossings, a wooden footbridge and bale jumps. Races range from about 1 km for young children to a 5 km open race.

A running event in Iroquois Park with an approximately 7.5 mile Lookout course and a 3.4 mile Short Loop option. Finishers receive medals and shirts are available by preorder with limited race day sales.

A traditional up and down mountain race in Waterville Valley, NH on September 20, 2026 covering about 7 miles with 3000 feet of ascent; youth entry is available and day of registration is offered.

A coffee-themed, untimed 2K and 5K run at Case Creek Trails near Coal Valley, IL, with aid stations, post-run hot drinks and treats, optional swag, and proceeds supporting The Rock Island County Animal Care & Control Shelter through QC PAWS..

A trail 5K at San Pedro Valley Park on September 20, 2026, with a kids run and member picnic. The course features an uphill switchback first mile, scenic mid-mile views, and a flat fast final mile.

The Arc'teryx Run Boston will take place in Milton on Sunday 20 September 2026. You can run 10 kilometers.

A day of the Northwest Series at Hell's Gate State Park in Lewiston, ID offering 5K, 10K, half marathon, marathon and 50K distances with listed entry fees and on-site merchandise.

A point to point 100 mile trail race from Logan, Utah to Bear Lake on September 25, 2026. Entry required a recent long distance qualifier and eight hours of service and the race serves as a qualifier for major ultras.

A multi-day trail running festival in Mammoth Lakes with races from a kids 1K to a 50K and the Dragon's Back Ascent, plus talks, live performances, community runs, awards, and prize money.

A multi-race Rocky Mountain series based in Logan, UT requiring completion of four races including the mandatory Bear 100. The roster offers multiple 100 mile options and an informal summation of a runner's fastest four finishes.

A point to point ultramarathon on the Cowboy Trail in Nebraska offering 200 mile and 100 mile distances, multiple aid stations, and time cutoffs. The route follows an old rail corridor with mostly crushed gravel and many former railroad bri..

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.

A 136 mile trail event in Whitewater, WI following the Ice Age State Trail across varied terrain with nine supported aid stations and about 11,148 ft of ascent. The course allows 55 hours for completion.

A three day mountain running weekend at Arizona Snowbowl in Flagstaff featuring a steep hill climb, multiple trail distances from 5K to 50 miles, and fixed time loops that reach about 11,500 feet.

A two day festival in Shawnee Ohio on the Buckeye Trail featuring a Half Marathon, 10K, 5K, a 10 Mile Hike and a backpacking workshop. Events occur on mostly single track trail within the Wayne National Forest.

Knight Ruck at Gov. Dick on September 25, 2026 offers 8 mile and 4 mile ruck march options with adult and junior weight rules, prizes for weighted participants, and proceeds shared between the Knights of the Kingdom and Gov. Dick.

The Caldwell Cougar Chase 5K and 8K will take place in Woodland Park on Friday 25 September 2026. You can run between 5 and 8 kilometers.

A fall weekend of trail running and camping in the Sawtooth Backcountry, staged from Foggy Dew Campground with guided routes, glamp style camp amenities, shuttles, and three distance options.