Not very many problems here left but there is one hard project and two very good problems just make sure you have some pads and a good spot.
From the Zen Pen Area, stay on top of the cliff band (don't go down the ladder) and keep walking south. eventually you'll reach a point where the cliff takes a turn to the east and sort of peters out. Walk down into the little stream that feeds into the river, and walk to the south east (on the left side of the little feeder stream). Keep walking south east along the sporadic cliff line past some old junk metal and along a very steep and tall cliff. Eventually you will get to the end of the little trail. Here there should be a very steep wall with a whole bunch of broken up boulders on the right side of it. Sometimes there is a water fall here too.
Browse More Classics in Purgatory
Mountain Project's determination of some of the classic, most popular, highest rated routes for Purgatory:
New Map to Hell V3 Boulder
Learning to Fly V7-8 Boulder, 20 feet
(tall project) V8 Boulder
Featured Route For Purgatory