IMPROPER PLANNING/DECISION BY THE PILOT AND HIS FAILURE TO MAINTAIN ADEQUATE AIRSPEED, WHILE TURNING OVER HIGH TERRAIN BESIDE THE AIRPORT, WHICH RESULTED IN AN INADVERTENT STALL. FACTORS RELATED TO THE ACCIDENT WERE: EXCESSIVE GROSS WEIGHT OF THE AIRCRAFT, HIGH DENSITY ALTITUDE, THE TERRAIN, AND LACK OF AVAILABLE ALTITUDE TO RECOVER FROM THE STALL.