You’ve definitely heard of Tough Mudder. It’s the thing your sister signed up for as a New Years Resolution, the event that the guy in your office who sits behind you in the office keeps asking you to do with him. That’s the normal Tough Mudder, they happen all over the world throughout the year and see huge numbers take part. Once a year, though, there’s World’s Toughest Mudder; a 24 hour endurance race just outside Las Vegas.

This year, we headed out to the Nevada desert to see what was going on, and why people were flying halfway around the world to put their body through so much pain.