A Loss Of Thermal Lift During A Glider Flight, Which Resulted In A Collision With Trees During A Landing Approach To A Diversionary Airport Analysis: The pilot of the glider had located five possible locations for off airport landings in advance of the glider flying event. On the accident flight, after receiving an aerotow, he maneuvered in the local area and found thermal lift that he used to climb further. After finding additional lift, the pilot flew across a ridge line toward a mountain where he hoped to find additional lift but was unsuccessful.
