You’re standing in a huge field—maybe it’s at a park, a campground, or even the grassy expanse surrounding an airport. All around you are packs of mud-covered, grinning athletes. They’re climbing ...

With obstacle names like "Arctic Enema," "Electroshock Therapy," and "Cage Crawl," it's no wonder Tough Mudder bills itself "The Toughest Event on the Planet." "It's not easy," said Anissa Buckley, ...

Ohio alone is host to more than a dozen such events, and most tend to sell out. Never mind the $100 entrance fees or the grueling, sometimes brutal, nature of the obstacles. People of all ages are ...