On March 6, 2004, about 1220 Pacific standard time, a Cessna 182E, N2819Y, collided with obstacles during an off airport forced landing in field near Sonora, California, following a total loss of engine power. The pilot/owner operated the airplane under the provisions of 14 CFR Part 91. The commercial pilot and one passenger were not injured; the airplane sustained substantial damage. The flight departed Columbia Airport (O22), Columbia, California, about 1215, with a planned destination of Pine Mountain Lake Airport (Q68), Groveland, California. Day visual meteorological conditions prevailed for the local area flight, and no flight plan had been filed. In a written statement, the pilot reported that after departure, he leveled off at 4,000 feet mean sea level (msl). While adjusting the mixture setting, the engine began to lose power. He placed the mixture back in the full-rich position, in an effort to regain power. The engine began running intermittently and then stopped. He glided away from populated areas below and landed in a field surrounded by hilly terrain. During the emergency landing rollout, the pilot was unable to stop the airplane, and collided with a barbed wire fence. The airplane continued down an embankment, resulting in the nose gear collapsing. During the accident the airplane incurred damage to the firewall, left wing, and horizontal stabilizer. The pilot thought that the accident could have been prevented if he had accurately checked the fuel quantity prior to departure. The pilot reported no preimpact mechanical malfunctions or failures with the airplane.