Clint Eastwood's BackYard Ultra used the "Last One Standing" format, and is a new race in 2019, to be held in 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 medal and shirt to commemorate their failure.
Note that the race starts at the Thursday/Friday midnight, so you need to be at the start line at 11.59pm on Thursday night.