Snowboarder unintentionally triggered a 6-8inch wind slab while dropping into a line at 7800ft on an east face. It propagated roughly 20 yards out underneath the rocks at the entrance to the line and ran over the small cliffs below. On impact underneath the cliffs, a slab propagated another 20-30 yards in both directions and stepped down resulting in a 3-4 ft crown beneath the cliffs. Debris piled on the lake below was heavy enough to crack the ice. No one was caught or injured.
