On September 21, 2003, at 1511 eastern daylight time, N7225E, a Cessna 182B, was substantially damaged during landing at the Manitou Field Airport (91NY), Spencerport, New York. The certificated private pilot received minor injuries and the passenger received serious injuries. Visual meteorological conditions prevailed for the flight which originated at the Sackett Farms Airstrip (2NY4), Byron, New York. The personal flight was conducted under 14 CFR Part 91. The pilot reported that as he was on the downwind leg of the traffic pattern, he observed several "four-wheelers" on the approach end of the runway. He planned to land beyond the vehicles, and flew a "little higher than necessary" during the approach. Immediately after touchdown, the pilot applied the brakes; however, he stated he was too close to the end of the runway to perform a go-around, and steered the airplane off the right side of the runway, impacting an embankment. The pilot reported 1,394 hours of total flight experience, all of which were in make and model. The pilot also reported no mechanical deficiencies with the airplane. According to a Federal Aviation Administration inspector, the airplane touched down more than half-way down the 2,450-foot long, 90-foot wide, turf runway. Weather reported at the Rochester International Airport, Rochester, New York, 6 miles to the southeast, at 1454, included calm winds, and 10 miles visibility.