Swampman Backyard Ultra

Swampman Backyard Ultra is an ultramarathon race where participants must consecutively run a distance of 6,706 meters (4.167 miles) in less than one hour. After each lap, the remaining time can be used for rest and food. Every hour, you will stand at the starting line and run another lap until only one runner remains. The Lithuanian record is 22 laps, and the world record is 108 laps.