Backyard ultramarathons in United States (East)

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

Rugged Concord woods course with diverse, demanding terrain and intense conditions

Looped 5k trail course with intense heat, Last Man Standing and 50K ultramarathon options, capped at 100 runners

Wooded Mt. Hoevenberg forest loops in Lake Placid, a backyard ultra in the Adirondacks with scenic woodland terrain and repeated laps.

Endurance event featuring flexible distances, including options like a 50-miler, in a supportive format with last runner standing

4.167-mile loop through Oak Mountain State Park with 500 feet of elevation gain per lap, backyard format, limited aid, capped at 100 participants

Flat looped course with variable time limits by age, featuring veteran ultrarunners and a strategic focus on endurance and pacing

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

Big’s Back Yard Ultra format: 4.167-mile hourly laps on forest trails, stream crossing, ancient glacial esker, open-field climbs and descents.

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

Short, moderately hilly loops on gravel roads, trails, and rolling fields at Blackberry Ridge Farm, last runner standing format near Charlotte, NC

Trail ultramarathon festival through the untamed wilderness of Seven Bends State Park

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

Hilly jeep road loops on 1North Adventure Trails, hourly 3.5-mile circuits, night running emphasis, flexible pacing, festive atmosphere, pancake breakfast

Birthplace of the Backyard Ultra featuring the iconic 4.1667-mile loop, historic venue for world record performances and legendary endurance showdowns

Out-and-back gravel trails with moderate elevation changes, unpredictable weather, and a welcoming course design

Backyard ultra at Wade Mountain Preserve: road opening, singletrack loops, then overnight road-only laps in classic last-runner-standing format.