When it comes to these beastly events, suffering is a given. Crossing the finish line requires some serious grit and fitness, and more than a little luck. While accessible to anyone who wants to push themselves to their limits and beyond, you don’t want to sign up on a whim. These events demand a lot of planning, expertly structured training and respect. That said, there’s nothing like conquering a monumental challenge that seems impossible, crazy even. It’s an experience that leaves you changed, and likely hungry for more. So, which one will you tackle first?