In the pilot's written statement he reported that he was flying northbound in a canyon to land back to the south (runway 17). He said that while on the left downwind leg, at 5,800 feet, he turned "one ridge too soon, which put me a little high." He noted his airspeed as 70 miles per hour (mph); however, as he descended the airspeed increased to 90 mph. The pilot stated that the airspeed was fast, but he still had a lot of runway to work with. He decided to land and when he flared the airplane floated. Even though the airspeed was bleeding off, he tried to force the landing. After touchdown the airplane began to porpoise. On the second bounce, the nose wheel touched down first; he wasn't sure if it would be worse to take off with a damaged nose wheel or try to land. The third time it touched down, the pilot stated that he flew the airplane straight down the runway until it stopped on the right side of the runway. The airplane sustained structural damage to the firewall. The pilot reported that there were no preimpact mechanical malfunctions or failures with the airframe or engine. In the section titled RECOMMENDATION (How could this accident have been prevented) of the pilot's written report (NTSB Pilot/Operator Report, Form 6120.1), the pilot stated that he should have flown with a pilot familiar with the area, and he should have taken a course in mountain flying. The pilot also reported that when he knew that he was high, to go around and set up for a better approach.