In 2005, Katherine Cook hiked the Pacific Crest Trail.
In case you're not familiar with the PCT, it's 2,650 miles long and generally takes about five months. (Have you read Wild? Or seen the movie? Yep, that's the trail I'm talking about.)
Cook's journey didn't end with that one adventure, though. She biked the Great Divide Mountain Bike Route in 2010, hiked the trail again in 2013, and hiked the Hayduke Trail in 2015, which is 812 miles long and stretches from Utah to Arizona.
For most of us, daily calorie-burning activities include a walk to and from work and the occasional 45-minute spin class. So, what on earth do you eat, how much do you sleep, and what do you spend your time thinking about when walking is your job?
I got in touch with Cook to find out. Here's what she had to say: