Backyard ultramarathons in United States (New England)

Mostly flat 3.5-mile gravel loop on Back Cove Trail, circling a tidal estuary with scenic views and a short paved bridge crossing

1-mile loops with 300 feet of gain, last man standing format honoring the 2nd Battalion 4th Marines

Scenic forested loops at Pineland Farms, 4.2-mile double-track trails with moderate elevation changes

Lush singletrack trails, steep climbs, and wild blueberry fields within Bear Brook State Park; variable ultramarathon distances revealed before race day

Looped 4.167-mile course through Needham town forest and Rail Trail, starting hourly from Claxton Field Quarry with no road crossings

Forested 4-mile singletrack loop with rolling terrain, snowmobile trails, fields, rugged logging roads, and 300 feet of elevation gain per lap

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

Last-person-standing format on Mount Ascutney: hourly steep laps with 1,209 ft of climbing, broad views, and possible late-season cold, snow, and ice.

50K and 50-mile options on vehicle-free gravel park roads in Cobscook Bay State Park, using a modified Backyard Ultra loop format.

Backyard-style ultra on coastal Maine trails, 4.17-mile loops around Buttermilk Mountain with single and doubletrack through serene woodlands

Hilly, technical 3.11-mile loop on Ragged Mountain with hourly starts and last runner standing format

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