WHAT IS A BACKYARD ULTRA?

A backyard ultra is a last-runner-standing endurance race.

Every runner must complete a 6.7056 km (4.167 mile) loop within one hour.

At the start of the next hour, the remaining runners set off together again.

And again.

And again.

Until only one remains.

01. THE START

Everyone begins together on the hour.

02. THE YARD

Complete the 6.7056 km route within 60 minutes.

03. THE RESET

Whatever time you have remaining is yours to eat, rest, change kit and prepare.

04. GO AGAIN

Be back in the starting corral for the next hourly start.

05. THE LAST RUNNER

The last remaining runner must complete one final yard to win.