Three Fingered Jack, rising between Mt. Jefferson and Mt. Washington, is one of the oldest high volcanoes in the Cascades. It has some very poor, rotten, friable rock. It is characterized by a high ridge above a base of scree. On a clear day, the summit has excellent views up and down the line of peaks from Hood in the north down to Southern Oregon. It is a fairly popular climb in the area although not without some exposure involved in the climb. You need to bring your own water in and try to be sensitive to the erosion going on if not climbing or descending in snow.