According to the glider pilot, during a glider competition he passed a "weak frontal system" and lift could not be sustained. He determined that he had about 15 minutes of flight before the glider was going to land. He selected a large field and established a traffic pattern and accomplished a full stall landing. However, during the landing roll on down sloping terrain about 40 knots, the glider collided with a ditch.
The glider sustained substantial damage to the tailboom.
The pilot reported that there were no mechanical malfunctions or failures with the glider that would have precluded normal operation.