Harvey Lewis has won Big Dog’s Backyard Ultra — one of the most impressive athletic accomplishments ever.

Here's how it works:

Competitors run a 4.16-mile (6.7km) loop every hour over hilly terrain.

If they complete their lap in under an hour, they can use the remaining time… pic.twitter.com/RcLHHPrgln

— Joe Pompliano (@JoePompliano) October 26, 2023