Endurance Series

There are three different events formats in the Endurance Series. In order of shortest to longest, they are Tough Mudder Infinity, Toughest Mudder, and World’s Toughest Mudder.

Endurance Series events don’t have a fixed distance — they have a fixed time limit. The challenge is simple: complete as many laps as you can before time runs out. Tough Mudder Infinity events are 8 hours long, beginning Saturday morning. Toughest Mudder is 12 hours, beginning near sundown on Saturday and ending on Sunday morning. World’s Toughest Mudder is a full 24-hours, beginning on Saturday morning and ending on Sunday.

Sort of. Unlike most Tough Mudder events, the events in the Endurance Series have timing chips and leaderboards; however, the expectation is that the athletes will uphold the Tough Mudder values, including helping those around them, These events are ultimately about seeing what you’re capable of, not leaving other athletes in the mud.

The Holy Grail is your prize for successfully finishing one of each Endurance Series event in the same calendar year – including Tough Mudder Infinity, Toughest Mudder, and World’s Toughest Mudder.

We keep a running tally of all mileage completed at Tough Mudder Infinity, Toughest Mudder, and World’s Toughest Mudder within a calendar year. The leaderboard is updated a few days after each Endurance Series event to reflect the current standings. At the end of the year, the winners will earn a Season Pass Plus and a custom embroidered jacket.