The pilot called the tower on the radio at 1009 and stated he was inbound to the airport with a low fuel state. Shortly thereafter, the pilot reported that the engine had quit and he would not make the runway. The aircraft landed on a forest service road and collided with trees during the ground roll. In a written statement to responding sheriff's deputies the pilot reported that he 'miscalculated the fuel for the duration of the trip and ran out of gas.' Examination of the fuel system revealed that it was intact and contained only residual fuel.