Clint Eastwood's BackYard Ultra uses the "Last One Standing" format, returns for a second year in 2020 to Brisbane's South Side.
The race is held on a 6.83km trail lap and you must run one lap per hour - be ready to start your next lap on the hour or you're out!
The Last One Standing has to complete another hour on their own to win. All "non-winners" get a DNF wooden spoon to commemorate their failure.
The 2020 event will be hosting Gary Cantrell, aka Lazarus Lake, of The Barkley Marathons & Big Dog's Backyard Ultra infamy.