Also, for several weeks, the Ski Patrol has been working the East Wall. This involves lots of shots from the avalauncher and routes in the North Pole and Tree Chutes regions. Yesterday, they traveled out the East Wall Traverse pocket and slab hunting. Their work has resulted in several avalanches. The East Wall typically opens when the mid-mountain base is somewhere around 50 inches. That can vary a bit depending on snow, wind and avalanche conditions.