Fatdog Backyard Ultra

Registration for our 2025 event is open!

FatDog Backyard Ultra is an inclusive event following the Backyard Ultra format, where participants complete a 6.7056 km (4.167 miles) lap every hour starting on the hour until they either do not complete within the time limit or do not start the next lap at the top of the hour. The last person standing is declared the winner; all others are "DNF."

For full description of the event, please see our " Event Information" page. 
For full course description including course maps, please see our "Backyard Ultra Course" page.
For a complete listing of all race rules, please see our "Backyard Ultra Race Rules" page.

Backyard Ultra Registration
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