Climb blocky chossy 5.5 unprotected to a bolt just below a big ledge, the Diving Board? Follow the crack up and left from here- keep an eye out for the occasional nut and cam placements... once you reach the more vertical (crux) portion of the crack, the pro is good, but the rock is just as dirty.
This climb I felt was not full-on 'R', but is not a good lead for a 5.7 leader either. Don't blame me, though.
This climb is the corner/crack just to the left of the first bolted routes you come to at River Wall (Pale Face 5.11 and Shake-n-Bake 5.12-).
You'll pass 1 bolt on your way up to the Diving Board, then trad gear from fingers to a 4" camalot will see you to the 2-bolt anchors, which are equipped for rappelling.