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

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.

Anytime you finish a climb, there's always the next thing you can try.

I like the simplicity of soloing. You've got no gear, no partner. You never climb better than when you free-solo.

'Dirtbag' is just the term we use, like a 'gnarly dude' in surfing. Within the climbing culture, it means being a committed lifer: someone who has embraced a minimalist ethic in order to rock climb. It basically means you're a homeless person by choice.

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.