The airplane was substantially damaged at about 1600 Eastern time when it collided with terrain. The private pilot was seriously injured. Visual conditions prevailed. The airplane came to rest in a cow pasture, oriented approximately north/south. According to an FAA inspector, the field where the airplane came to rest was parallel to, and oriented in the same direction as, the turf runway at the pilots destination airport, which was approximately mile away. He added that the initial ground scar in the cow pasture was abeam the turf runways approach end.