Pets are not permitted on Alcatraz Island, only trained service animals are allowed on the ferry and the island. Under current disability rights regulations "emotional support animals" are not allowed as they are not specifically trained to perform a task in support of a person with a disability.
Did You Know?
U.S. Penitentiary Alcatraz had a complete hospital in the cellhouse which was staffed by medical personnel from the Public Health Service in San Francisco.