Northwest Chimney 

The "walk off" is more akin to the Class 4 downclimb from the north end of the The Blob- some pretty committing moves that could or should be belayed for first time climbers. We climbed down the boulder prow almost directly north, crux being a skinny body chimney that required some arm bars to wiggle feet and hips lower down.
Then again, if you're climbing this JTree chimney, you're probably not a real "first time" climber. Easy rating, but any JTree chimney takes a good amount of experience to lead successfully.