50K ultramarathons in Massachusetts, United States in 2026

10-mile singletrack loop through Noon Hill Reservation, diverse terrain and minimal road crossings, near Boston yet set in immersive woodlands

Mostly flat 50K and 50-mile courses on scenic New England trails at DCR Great Brook Farm State Park, featuring roots, rocks, and fall foliage.

Double-loop figure-eight 50K in Pittsfield State Forest, with substantial climbing, fast descents, Taconic Crest Trail, and sweeping vistas.

Scenic 1.9-mile groomed loop at Notchview with self-timed laps, access to aid station, and options for 50km, 50-mile, or 24-hour challenges

Mixed surfaces through picturesque Norwell, Plymouth landscapes, with sections of paved paths, rail trails, and both single and double track terrain

Rolling paved and dirt roads in Connecticut’s Northwest Hills, with hilly terrain, Judds Bridge out-and-back, and New England autumn scenery.

Ten 5K paved loops in Forest Park with limited traffic, possible snow, and flexible distance options on the Snowstorm Classic 5K route