The alpine environment is very delicate. I've been able to see change in the mountains in the 20 years that I've been climbing full-time. Glaciers have receded. The tree-line is changing. That's very rapid to see nature changing in a 20-year period.

If you compare Everest photographs in 1953 with its current state, things are melting. I imagine if I were a golfer in Indiana, I'd be hard-pressed to believe in climate change because nothing's going on there. But when you're up in the mountains and seeing the glaciers melt away, it's an obvious physical manifestation of a warming planet.

Looking out of a tent door into a world of snow and vanishing hopes. ~George Mallory

Mountains are freedom. Treat them respectfully.

The mountains are a demanding, cold place, and they don't allow for mistakes.

Climbing, as my grandmother said, it's a pretty frivolous thing. She always wondered when I was going to get a real job. But climbing is a real job for me now, and I enjoy it. It's a gift that I'm able to do it, share adventure and motivation with people.