The pilot stated that he was landing at the conclusion of a local flight. As the airplane passed over the runways threshold the airplane's main landing gear contacted high grass. The airplane nosed over and impacted the runway inverted, resulting in substantial damage to the vertical stabilizer and both left and right top wings. The pilot reported that there were no mechanical malfunctions or anomalies with the airplane, and that the accident could have been prevented by conducting a higher approach to landing.