Business Insider spoke with CEO and founder of Tough Mudder Will Dean, about why people repeatedly come back to tackle the famous obstacle course. He said: "We are a tribe, a community.

Authorities interviewed Tough Mudder staff and vendors, visited several of the race obstacle sites ... this year but are ...

The most extreme, imposing, and heart stopping endurance challenge on the planet is making history - Worlds Toughest Mudder ...

In 'Rise Of The Sufferfests', Scott Keneally takes an investigative approach to obstacle racing, navigating the sport’s muddy past, present and future. Over the past several years, obstacle ...