According to the pilot, he was landing on a short runway and during landing roll out he was unable to stop the airplane. The airplane overran the end of the runway at about 10 to 15 miles per hour. After exiting the runway the pilot steered the airplane to miss a four-inch diameter round pipe sticking out of the ground on the extended runway centerline, but the right main landing gear struck the pipe. The right main gear collapsed and the airplane came to rest in a shallow ditch and on a road. The right wing spar was bent. Flight control continuity was confirmed and no systems anomalies were found. Skid mark analysis by police on scene indicated the airplane landed 300 feet down the 2,565 foot runway. The FAA inspector on scene computed a landing roll of approximately 2,200 feet.