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.

Today, Tough Mudder announced a list of new obstacles and challenges that would be added in 2017, which are sure to recruit a new band of die-hard competitors as well as welcoming back old hands.

Goldsmith was among the 5,000 people who had just taken part in the 2023 Tough Mudder race at Sonoma Raceway, a popular 5K to 15K event and obstacle course that has been held annually since 2010 ...

and conquer obstacles unlike anything seen before on a Tough Mudder course. Gruelling climbs and quad-burning descents will test endurance on the steep, hilly terrain, while rugged forest trails ...