We did the Princess tour to Alcatraz last Oct. If you really want to see the Rock purchase your own tickets. There is so much to see and so many stories to hear from the prisoners and guards that on the Princess tour we were given less than 90 minutes to tour and be back on the boat. The climb from the landing to the prison can be difficult, the equivilant of a 13 story building although the walk is up a series of ramps. There is also a trolley for persons less mobile. I am not certain but there could be a wait which would reduce your touring time. I would say to really see Alcatraz you need 2 to 2 and one hours. This was the best part of this fabulous cruise. San Francisco is wonderful as is Santa Barbara and San Diego. We are again booked for this cruise in Oct. Have a wonderful cruise.