2026 milesComing SoonLazarus Lake
Big Dog's Backyard Ultra Association
Bell Buckle, Tennessee
116
Days Away
About This Race
Big's Backyard Ultra is the Individual World Championship of the Backyard Ultra format, where competitors must consecutively run 6,706 meters (4.167 miles) in less than one hour, repeating until only one runner remains. The event is held in Tennessee and serves as the pinnacle of the global Backyard Ultra circuit.
Key Dates
Race Day
Dec 31, 2026
Get alerts for Big Dog's Backyard Ultra Association
Registration opens, price changes, race updates: straight to your inbox.
Race Planning
Plan Big Dog's Backyard Ultra Association with Crewable
Build your aid station plan, organize your crew, and dial in your nutrition strategy. Everything you need to finish strong.
Make Race PlanAre you the race director for Big Dog's Backyard Ultra Association?
Claim this race to manage registration, volunteers, and race-day ops on Endurance HQ.