Big’s Backyard Ultra: inconceivable endurance, seasoned regulars, and an idiosyncratic racing format: this distinctive ultra is a sight to behold.

This Saturday, October 20th,is the (in)famous Big Dog Backyard Ultra, in Bedford County, Tennessee. An ostensibly simple race, Big Dog has been described as one of the most mentally and strategically complex races in the world – contestants run a 4.1 mile loop every hour, day or night, nonstop. The last man or woman standing is crowned the victor.

Click here [link] to listen to our conversation about the race, Guillaume’s life in Los Angeles, and the role that running plays in Guillaume’s life.