Professional climber and filmmaker who has become a sensation on Instagram and YouTube for his risky first ascents of mountains and rock formations around the world. He is a National Geographic Explorer and has served as a contributing editor for Climbing Magazine.
He first became interested in climbing while studying for an English degree at Humboldt State University.
He is one of the stars of the documentary The Sufferest (2014), in which he travels across California climbing some the state's most dangerous routes.
He married Nellie Milfeld.
Climber Alex Honnold is his co-star in The Sufferest.