Tommy Caldwell Quotes
I've always been really curious about the limits of human capability.
Citations
Caldwell, Tommy. The Push: A Climber's Journey of Endurance, Risk, and Going Beyond Limits. Viking, 2017.
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Tommy Caldwell is an American rock climber accomplished in sport climbing, hard traditional climbing, big-wall speed climbing, and big-wall free climbing. Caldwell made the first free ascents of several El Capitan routes in Yosemite National Park.