Arkansas Backyard Ultra!

Saturday, May 21 is the Arkansas Backyard Ultra.  Backyard ultra is a form of ultramarathon race where competitors must consecutively run the distance of 6706 meters (4.167 miles) in less than one hour. When each lap is completed, the remaining time within the hour is typically used to recover for the next hour's race.  Exactly one hour after a backyard ultra's first starting time, the competitors run an additional 6706 meters with a one-hour window for completion. These distance loops are repeated hourly. The race ends when the last runner or runners either concede or fail to finish the distance within the allotted time frame.  Read more:  https://en.wikipedia.org/wiki/Backyard_ultra