Fun climbing on an upside-down staircase, then an easy face. The crux is at the big roof followed by another short easy face. Very varied. To find this route, follow the first main Watchtower wall around to the right into a corner and look for the upside-down staircase between two large chimmneys.
I top-roped this route by hiking around the west end of the buttress and rapping down off a big tree. It was a bit of a hassle, but there's a nice ledge and anchors at the top of the route once you get there. For trad, there are many horizontal seams that would probably take small nuts or cams, and at least one old piton underneath the large roof.