Big Dog's Backyard Ultra, often simply referred to as Big's Backyard Ultra, is the original backyard ultra, invented by Gary "Lazarus Lake" Cantrell of Bell Buckle, Tennessee. Participants run a 4.167-mile loop every hour, and are eliminated if they fail to complete a loop in an hour.
Big Dog's Backyard Ultra, often simply referred to as Big's Backyard Ultra, is the original backyard ultra, invented by Gary "Lazarus Lake" Cantrell of Bell Buckle, Tennessee. Participants run a 4.167-mile loop every hour, and are eliminated if they fail to complete a loop in an hour.
Source: Wikipedia "Big's Backyard Ultra" · CC BY-SA 4.0
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