Trail ultramarathons in Rhode Island, United States

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

2.45-mile loop with mixed trail and path, moderate elevation gain, minimal aid, variable New England weather, and classic low-frills ultrarunning format

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

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

Private-trail last-runner-standing loop with steady climbing, ~450 feet gain, winding singletrack, and technical rocks, roots, and low logs