Founded in 2010, Tough Mudder now has six million participants worldwide, hosting 130 challenges and endurance events ...

Some unseasonably cool temperatures made for some cold water at some of the obstacles in Saturday’s Tough Mudder Indiana.

But Tough Mudder is also, as head course designer Nolan Kombol sees it, “a huge social experience. You’ll see people who’ll stay on top of Everest and help 15 or 20 people over.” ...

As part of the annual Dubai Fitness Challenge, Spartan Race and Tough Mudder will take over the Wadi Hub at Hatta Resorts on ...

According to Tough Mudder’s website, no races were scheduled in Sonoma County this year. KRON4 reached out to Tough Mudder about the claims mentioned in the lawsuits filed but have not heard back.

Tough Mudder is also adding new challenges for its "Legionnaires," or participants who have completed at least one event. Those obstacles include the Snot Rocket, a beefed-up version of the ...

Tough Mudder is a test of grit, not athletic prowess. (From the Mudder pledge recited just prior to the event: "I do not whine -- kids whine.") ...

Tough Mudder participants have climbed a total of about 5,700 vertical feet, plunged into 38 degree water, scaled the equivalent of an 11-story building in one obstacle, and jumped through fire.

Dean said Tough Mudder had signed up 70 franchisees in the U.S. and could do as many as 1,000 in the U.S. and another 1,000 abroad. Follow USA TODAY reporter Nathan Bomey on Twitter @ NathanBomey.

"10,000 people have had the Tough Mudder logo tattooed on them. That speaks to what it's about. It's a value set. It's a mindset," said CEO Will Dean.

Tough Mudder's obstacles will for the first time include "Kong Infinity," a 15-foot climbing challenge invented by more than three million former Mudder athletes; and "Happy Ending," a 25-foot ...

May 16, 2019 / 3:30 PM EDT / CBS Philadelphia COATESVILLE, Pa. (CBS) – Tough Mudder is returning to Pennsylvania for the 10th year this weekend in Chester County, but it comes with new twists.