On August 6, 2007, about 1841 Pacific daylight time, a Cessna 172B, N7604X, collided with trees during a go-around at the Sisters Eagle Air (uncontrolled) Airport, Sisters, Oregon. The private pilot, who owned and operated the airplane, was not injured, and the airplane was substantially damaged during the personal flight. Visual meteorological conditions prevailed at the time, and a visual flight rules flight plan had been filed. The flight was performed under the provisions of 14 CFR Part 91, and it originated from Tillamook, Oregon, about 1630. The pilot reported that when he was on final approach he observed a person located near the side of the runway, and he initiated a go-around. During the pull-up, a wind gust "pushed" the airplane in the direction of the person. The pilot further reported that he attempted to turn the airplane by moving the ailerons and rudder, but the airplane would not respond. Also, the airplane's altitude was inadequate to fly over trees located near the airport, and a collision ensued. The pilot reported that the wind's direction was variable. Its speed was 10 knots, with gusts to 15 knots. The pilot indicated that the accident could have been prevented had he concentrated his attention on flying the airplane instead directing his attention toward the bystander.