Slabby face is 5.6 with trad pro for 3/4 of the way up. This is followed by a few 5.8 moves with bolt protection to reach the anchor. The crux is just after the last bolt and before the anchor- feet are thin. The bolt is still reasonably close at this point.
Probably a good route to set a TR on for beginners, as it's 5.6 most of the way.
Location
Climb 8 in the beta photo. The excellent original online guide might also be of help. The slabby face left of the white left-facing dihedral. Rap route w one 60m rope.
Protection
3 bolts up high. Nuts and cams (1 set, small ones mainly) for the bottom, unless you're ok soloing 5.6 (then you need only draws). 2-bolt anchor.
I believe that this route was established by some combination of Mark Thomas, Tom Wezwick, Karl Kiser, and Chris Kessler, all of whom worked together on several routes at Diablo and in particular on the Winter Wall.