You'll reach this highest ledge from the N, off the left side of the picture. Traverse around the S side on an airy ledge. You'll find a choice of flaring cracks to the crest: the first ones will give less rope drag, but if you continue farther E you'll have somewhat easier climbing with more pro. The summit is at the E end; the rappel is from the W end. Traversing the crest is easy Class 5.