According to the pilot, after a local flight he performed two touch-and-go landings at his home airport. As the pilot was completing a final, full stop landing on runway 28, a 3,472-foot runway, he was "unable to slow the airplane down" before the end of the runway. The airplane overran the departure end, and came to rest in a wetlands area, substantially damaging the engine, leading edges of the wings, and leading edge of the left horizontal stabilizer. The pilot did not report any mechanical failures or malfunctions of the airplane, and stated that the brakes were functioning normally. He noted that his total flight experience was approximately 141 hours; of which, about 6 hours were in the same make and model as the accident airplane. Winds, recorded at an airport 18 miles to the southeast about the time of the accident, were from 010 degrees at 4 knots.