12hr ultramarathons in United States (New England)

Scenic 1.9-mile loop at Notchview with a 0.2-mile climb, rolling single and double track, open fields, and cross-country ski trails

1.776-mile loop through historic Putnam Memorial State Park, featuring multiple timed race options in a landscape tied to Revolutionary War history

Scenic Colt State Park loops with pavement, rooty trails, and grass; mostly flat terrain, waterfront views, frequent aid stations, summer heat challenge

Scenic Chester, VT loops on single, double track, and Jeep trail; 1.8 miles with 200 feet climb per lap; six or twelve hour timed format

Demanding forest trails and varied terrain in the scenic Big River Management Area, West Greenwich, Rhode Island

Steep climbs, rocky and root-filled 10K loop on Wright’s Mountain, with fast forest descents and a mix of rugged Vermont terrain and elevation changes

Largely flat 4-mile loops on the New Boston Rail Trail by the Piscataquog River and Hillsborough fairgrounds

Hourly 4.1666-mile loop in Winchendon, backyard ultra format, relaxed camping and communal atmosphere with aid stations and bonfires

Multi-lap Monastery Trails course with a 50K trail option, scenic spring setting, and a festive St. Paddy’s Day atmosphere.

Single-track two-mile loop along White Lake, slightly technical terrain and beach scenery in White Lake State Park, New Hampshire.

Fixed-time hill-loop format with repeated climbs and descents, focused on cumulative elevation, pacing, and consistency over long hours.

4.25-mile loops with 500 feet of gain each, runnable park trails, fully stocked aid station, and trail maintenance fundraising support