You are hereHome / Training / Endurance Tough Mudder's New Obstacles for 2014 An exclusive look at Tough Mudder's latest challenges. by Mark Barroso Return to Gallery Topics: adventure racingextreme sportsfull body workouts Want more Men's Fitness? Sign Up for our newsletters now. more galleries 7 Rules for Gaining Mass What every guy should know, according to a pro bodybuilder. Smell Great 10 of the best antiperspirants that block sweat and stink. Fitbit Alta The latest tracker on the market is seriously sleek. Super Bowl Apps 10 better-for-you recipes to make for the big game.