50mi backyard ultramarathons

Scenic 4.167-mile loop in Sleepy Hollow State Park, with prairie, hardwood forest and pine, modest climbing, and classic last-runner-standing format

Alternating out-and-back 4-mile loops on a dirt Rail-Trail Route through high desert, sandy stretches, and a rocky turnaround near Shonto Marketplace

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

Rugged 3-mile obstacle course loop every hour, backyard ultra format, minimal aid, strict elimination until a single finisher remains