Top 9 New Tough Mudder Courses for 2013

WHAT IT IS: You scaled it, you mastered it—then they made it tougher. Last year participants inched across narrow strips of wood over a pit of water, using only the tips of their fingers and toes. Version 3.0 adds wider spacing between the wood, or removes them all together. When Tough Mudder says Just The Tip, they mean Just The Tip.

SKILLS YOU NEED: Agility, balance, finger strength, toe strength