A core intensive climb on small crimps.  Sit start on the same low, flat crimps that the MacGuffin starts on.  Move up and right, following small holds at the lip of the roof.  As you near the arete, make a large move to a left facing ledge, then move up to top out near the arete.

This route climbs along the low, small roof on the main face of the MacGuffin boulder along the main trail.  Look for it right of a narrow corridor and arete.

A few crash pads and spotters to move the pads as you traverse.