On June 25, 2006, about 0900 Pacific daylight time, a Maule M-7-235C, N209Z, veered off the runway and nosed over during landing at Brackett Field, La Verne, California. The pilot/operator was operating the airplane under the provisions of 14 CFR Part 91. The private pilot, and one passenger were not injured; the airplane sustained substantial damage. The local personal flight departed Brackett Field about 0854. Visual meteorological conditions prevailed, and no flight plan had been filed. The pilot submitted a written report. He reported that after touchdown on the runway, he lost directional control of the airplane. He stated "I was not succeeding in controlling it, so I let it run off the runway and it flipped over after the prop struck the ground." The pilot stated that the airplane and engine had no mechanical failures or malfunctions that would have precluded normal operation. The reported wind conditions at Brackett Field at 0847 were variable at 4 knots.