The crux drop comes in the heart of the canyon.  After the 15 footer, a massive horizon line appears.  Scout on river right.  A 8 foot entrance lands onto a rock shelf, twists left and drops at least 20 foot down vertical spout.  This is the Big Lebowski.  An alternative and more predictable line is to run The Dude, a 30 foot spout on the left that works better with more water.  The drop terminates a pool deep in a walled in gorge with little options for escape.