The Event: World’s Toughest Mudder is the Tough Mudder organizations championship event. Where other Tough Mudder events are billed as not a race but a challenge, World’s Toughest Mudder (WTM) is most definitely a race with $10,000 going to the male and female winners. The obstacles are beefed up and conditions are bad. This is to be a true challenge for Mudder veterans.