Yosemite has the most impressive and accessible granite big walls in the world. The rock is amazing. And because of that, it's been the mecca for climbing in the U.S. - and the world to a large degree - for all of climbing history. It's the place to test yourself against the historic routes of the past.

Seven years ago, when I started free soloing long, hard routes in Yosemite - climbing without a rope, gear or a partner - I did it because it seemed like the purest, most elegant way to scale big walls. Climbing, especially soloing, felt like a grand adventure, but I never dreamed it could be a profession.

There's only a handful of chicks in the world who can climb big walls on my level.

I love my climbing shoes. Virtually all of my big solos have been in the TC Pros. They are the most important thing when I'm soloing.

We are apes - we should be climbing.

I've done routes where I've climbed 200 feet off the ground and just been, like, 'What am I doing?' I then just climbed back down and went home. Discretion is the better part of valor. Some days are just not your day. That's the big thing with free soloing: when to call it.