50K ultramarathons in Massachusetts, United States

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

Scenic 6.2-mile trail loop at Bradley Palmer State Park, repeatable up to five times, on beautiful park trails with a relaxed, non-competitive atmosphere.

Classic early-season New England trail ultra with deep regional roots and longstanding community tradition.

Jeep trails and singletrack paths through Mt. Toby’s varied terrain, early-season race atmosphere

3.1-mile varied trail loop completed hourly, flexible distance and pacing, supportive atmosphere with no DNFs or penalties

Twisty, rocky 50K and 50-mile routes at Blue Hills Reservation, starting and finishing at Houghton’s Pond; challenging navigation through rugged terrain.

50K on gently rolling Jericho Town Forest trails, with smooth, relatively flat loops through wooded singletrack in Weston, Massachusetts.

Smooth, fast 50K and 30K routes on wide grassy lanes and winding single track through tranquil Watuppa Reservation forests

Single-loop 50K with 4,281 feet of gain on runnable dirt roads, trails, and pavement through Western Massachusetts and Southern Vermont landscapes

Rolling jeep trails and river views along the Chesterfield Gorge, featuring out-and-backs on unpaved terrain with permanent mile markers

Scenic Ashfield trails and dirt roads through Franklin and Hilltown Land Trusts, classic Beast Coast course with a focus on preserved landscape