Trail Running Calendar United States 2026-2027

A 100K trail ultramarathon in North Bend PA on the Black Forest Trail. The course has over 13,400 ft of elevation gain, steep climbs, a 19 hour cutoff, and rules that ban crews, pacers, and spectators.

Trail event in South Williamsport featuring 5K and 10K courses on Bluebird and Pocowanache trails, one aid station at Green Bridge, awards by age group, and proceeds supporting the Think Big Pediatric Cancer Fund.

A 26.4-mile trail marathon in Ashford, CT, on the Nipmuck Trail featuring rocks, roots, mud, and wood bridges, with a two-person relay option and race shirts available before September 12.

Trail races on Moscow Mountain near Moscow, ID offering 50K, half marathon and 5 mile courses on mostly single-track terrain with aid stations, drop bag options, a 10 hour cut-off for the 50K, and event awards.

An annual flat, scenic marathon and half-marathon on the Greenbrier River Trail in Pocahontas County WV, held October 4, 2026. Proceeds support trail maintenance and local athletic activities.

Keene Family YMCA Fall Foliage Trail Races feature 5K and 10K trail courses starting and finishing at the Keene YMCA, with chip timing, age-group prizes, and proceeds supporting YMCA programs and access.

A Halloween themed community event in Aspen on October 4, 2026, with a timed 5.6K run and a 1 mile walk around Koch Park and Marolt open space. Leashed dogs are welcome and net proceeds benefit the Friends of the Aspen Animal Shelter.

Join the annual Run Stanley event at Stanley Park for a variety of trail races including a 5K K9 run and an accessible 1 mile stroll. Support local wildlife sanctuary maintenance while enjoying a community day in the park.

Experience a unique trail run through 1600 acres of former prison grounds at Laurel Hill Park. Choose between 5.4 or 10 mile distances on scenic singletrack featuring historic guard towers and open meadows.

Kokanee Trail Runs on October 4, 2026 in South Lake Tahoe features a 1/2 Marathon, 10K, 5K and a half mile Tadpole Trot with scenic lake and mountain courses, aid stations, sustainable event shirts, and local charity support.

Experience a technical trail event in Highlandville featuring 5k, 10k, and half marathon distances. Participants enjoy a hilly course followed by a post race celebration with local craft beer and walking tacos.

A four-race trail series across local parks with increasing distances, chip timing, and series awards for runners who complete all four events. Entrants must be 15 or older and registration is online only.

A 5K on shaded eucalyptus horse trails at Ernie Howlett Park in Palos Verdes Peninsula on October 4, 2026. In person and virtual options are available, plus a fundraising route that waives the fee with at least $100 raised for Strides in Re..

A 25K trail race in Corvallis, OR on October 4, 2026, presented by a local non-profit and included in the Corvallis Trail Series. Registration closes September 30, entries include a shirt, and proceeds support local trail and rescue program..

Trail races in Bald Eagle State Forest offering a 13.6 mile half marathon and a 6.4 mile 10K over technical singletrack, steep climbs, stream crossings, and scenic overlooks.

Baker Lake Classic 25k on Sunday October 4, 2026 is a 25k event organized by NW Endurance Events. Registration closes October 3 and the entry fee is $80 with a race shirt offered for $25.

A 50K trail ultramarathon around Blue Marsh Lake near Reading, PA, on an approximately 31 mile loop with single track, rolling hills and one major climb. Relay teams of two to four complete the course in four legs with seven aid stations.

Experience the scenic Nocatee Greenway Trails in Ponte Vedra Beach with race distances including 10 miles, 10K, and 5K. This event features road and trail running alongside a dedicated 5K ruck and virtual race options.

Trail runs at Jefferson Memorial Forest with an 8-mile route and a 5-mile option, cupless hydration, on-course water for the 8 miler, restroom facilities, awards for overall male and female, and a virtual option.

A community 5k and a 54 yard dash on October 4, 2026 in Glendale with an out-and-back course on the Oak Leaf Trail. Registration includes all-day entry to Milwaukee's Original Oktoberfest at Old Heidelberg Park.