Trade in your walking shoes for some trainers next time you go see one of the world’s most awesome wonders. Great adventures give you a lot to remember, but the greatest give you something to train for.

Adventure marathons and ultra marathons aren’t just for lifelong runners; they’re for anyone looking to put a challenge back into places that have become all too easy to see. Why walk the Inca Trail when you can run it? Who needs a walking safari when you can marathon right though one. And what’s the big deal about hiking one of the most dangerous mountain trails in the world when there’s a race that dashes right up it?

The running events that follow all have one thing in common — they reconfigure the stage for the world’s most amazing destinations from being mere adventures, into the footraces of a lifetime. You don’t have to be a professional runner to enter, though some here would be challenging to the most adept athlete. You just need to channel the tireless spirit of Shackleton, a good pair of sneakers and, as Christopher McDougall writes in Born to Run, “you’d better be fearless.”

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