"Sentinel Peak" its self is to the left of the tower "Sentinel Rock". There are three trad routes on the peak. They are much shorter then the routes on the tower. The is one 30m and two 40m routes.
It is a rather steep hike and scramble up the left hand gully. There is a short wall in the gully that makes for an adventurous scramble. It is challenging and I recommend having a more experienced climber lead the scramble and place a piece or two of protection. There is some natural protection where you will find several cords around with abseil rings.