The airplane was destroyed and its sole occupant, a non-Instrument-rated Private pilot, received minor injuries on impacting terrain at approximately 1900 Pacific time. Visual conditions prevailed; the flight was originating at the time of the accident. The pilot later said he inadvertently entered a fog bank shortly after takeoff and he attempted a climbing right turn to return to the clear air over the departure runway. He said that his airspeed dropped and the aircraft stalled, impacted trees and descended vertically to the mountain side. The airplane came to rest inverted.