At about 1500 Pacific time, the airplane collided with terrain during an off-airport, forced landing following a loss of engine power. The airline transport pilot and one passenger sustained minor injuries; the airplane was substantially damaged. Visual conditions prevailed. This was the first flight following an annual inspection. Maintenance personnel completed a 10-minute ground run of the engine without any difficulties prior to the accident flight. The pilot reported that he experienced no anomalies during start, taxi, run-up or the takeoff. He stated the engine lost power about 100 feet above the ground.