NTSB Factual Report

The pilot of the glider reported that during a long distance ridgeline soaring flight, he encountered a loss of lift and dropped below the ridgeline. Unable to find another updraft, he was forced to land in an open field, with tall grass. As the glider touched down, the landing gear struck a large hole that was concealed by the grass, shearing off the landing gear and causing a ground loop when the left wing struck the ground. The fuselage and tail were substantially damaged.

NTSB Probable Cause

The glider's encounter with insufficient atmospheric lift conditions where the lift was not sufficient to maintain soaring flight, which resulted in an off-airport landing.