Clarence H. Walker was a wealthy young aviator living in San Mateo, CA. He started aviation as a pastime, building his own plane, but quickly decided to pursue it seriously with a better machine. He flew a Curtiss biplane at various shows in California, Hawaii, and Salt Lake City. Although a successful aviator, he suffered numerous crashes into trees, a fence, a barn, and a telegraph pole, all of which he survived. He holds the claim to being the first aviator to crash in Hawaii, on June 13, 1911 in Hilo, HI after his engine started failing shortly after takeoff.