Trail Running Calendar United States 2026-2027

Trail races at Glenroy Preserve on October 4, 2026 offering 5 mile, 25K, and 50K loops with mixed and technical terrain, multiple creek crossings, four aid stations, chip timing, and post-race refreshments.

Trail races in Groton, Massachusetts on October 4, 2026, organized by local running and trails groups. Two distances, 9.5 miles and 3.4 miles, total entries limited to 250, online registration closes October 3.

Experience a classic cross country race on the trails of North Park during the autumn foliage season. Enjoy 20k, 10k, and 5k distances featuring handmade bamboo medals and traditional folk dancing.

A multi-distance running event at Northeast Lakeview College featuring chip timed 5K, quarter and half marathon options, a kids dash, a virtual run, a judged Day of the Dead costume contest, aid stations, and a post-race rally with music an..

Run through 300 acres of scenic vineyards on a flat trail course in Peconic. Enjoy live music, food trucks, and a post-race glass of wine at this chip-timed autumn event.

Run by the Sea at Wilder Ranch State Park on October 4, 2026 offers a Half Marathon, 12K and 4K run/walk along mostly flat packed dirt trails with coastal bluff and Monterey Bay views. Organized by the Santa Cruz Track Club; proceeds benefi..

Trail races at Catalina State Park on 10/04/2026, including a 9.3-mile out-and-back on Nature, Bridal and 50-Year Trails and a 5k on Nature and Bridal; registration, amenities, medals and shirt details are provided.

A remote **100K** trail race in the Pennsylvania Wilds featuring over 13,400 feet of climb, steep short ascents, a lollipop course that reverses each year, and rules that prohibit crews, pacers, and spectators.

Trail races of 5K and 10K at Williamsport Water Authority feature singletrack, scenic views, and one aid station at Green Bridge; proceeds benefit the Think Big Pediatric Cancer Fund and race swag is guaranteed for the first 200 registrants..

A 26.4 mile trail marathon on Connecticut's Nipmuck Trail featuring rocks, roots, mud and wood bridges, plus a two-runner relay option. The course uses a 13 mile segment with out-and-back sections and published cutoffs.

Moscow Mountain Madness invites trail lovers to tackle 5 mile, half marathon or 50k courses across technical single track and forest scenery. Tough terrain, aid stations and authentic backcountry vibes make it a memorable mountain run.

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 6K trail run and walk in Aspen that welcomes dogs, offers timed results with cash prizes and costume awards, and donates net proceeds to the Friend of the Aspen Animal Shelter.

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 in South Lake Tahoe on October 4, 2026 offers a half marathon, 10K, 5K and a noncompetitive half mile for children, scenic views of Lake Tahoe, aid stations with Tailwind, and proceeds benefiting local charities.

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 in Colorado Springs with distances that increase each round and varied terrain from grass fields to rocky single track. Chip timing is used and series awards require finishing all four races.

A 5K at Ernie Howlett Park on the Palos Verdes Peninsula with a shaded horse-trail course, in-person and virtual options, and a fundraising entry where raising $100 covers registration and benefits Strides in Recovery.

A 25K trail race in Corvallis based at the OSU Forestry Cabin, part of the 2026 Corvallis Trail Series. Entry includes a race shirt, proceeds support local trail work, Corvallis Mountain Rescue Unit, and a shoe assistance program.