Rock Lobster climbs the indistinct dihedral/gully on the left for 15 feet, then moves right to a bolt by a seam that is followed up and right to a blonde undercling in the upper part of photo. (I'm not talking about the long undercling that goes right and up, across the middle of the photo.) From the right end of the high, short undercling, climb up through a lichen-infested break to the rim. Build an anchor. Walk off.