Boulder into the scoop left of Rat Race. clip and back up the peg runner above then climb past the peg and head left into the great groove of Mousetrap. Up this for a couple of metres and then traverse right to the hanging stance on Rat Race. It is advisable to continue onward. Either up the corners to the pegs and climb down to the bolt belay on Marlina or continue up pitch 2 along the roofs to a tricky last move. Superb.