On February 20, 2005, approximately 1445 central standard time, a Schweizer SGS1-26B glider, N7569, registered to Texas Soaring Association (TSA) of Midlothian, Texas, and operated by the pilot, was substantially damaged when it impacted trees and the ground while on final approach to an off-airport landing area near Midlothian, Texas. The private pilot, sole occupant of the glider, was not injured. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The local flight originated from the TSA Gliderport (TA11), near Midlothian, Texas, at an unknown time. The 360-hour private pilot reported in the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2) that he was unable to find any thermal lift to assist in gaining altitude to return to TA11, and he elected to land on a nearby open field which he considered suitable for landing. The pilot stated that while on final approach to the open field, he experienced gusty headwinds resulting in an "excessive sink rate." While at an estimated altitude of 30 feet above ground level, the outer portion of the left wing struck the top of a 30-foot high tree. Subsequently, the glider nosed-over and impacted the ground, coming to rest in the upright position. The pilot reported that at the time of the accident, the winds were from the southwest at approximately 15 knots, gusting to 20 knots. Examination of the glider by an Federal Aviation Administration (FAA) inspector revealed that the tubular structure of the nose was crushed aft just forward of the instrument panel.