Yvon Chouinard, Patagonia's founder, got his start as a climber in 1953 as a 14-year-old member of the Southern California Falconry Club, which trained hawks and falcons for hunting. After one of the adult leaders, Don Prentice, taught the boys how to rappel down the cliffs to the falcon aeries, Yvon and his friends became so fond of the sport they started hopping freight trains to the west end of the San Fernando Valley, to the sandstone cliffs of Stoney Point. There, eventually, they learned to climb up as well as rappel down the rock.