Closures: Thanksgiving, Christmas and New Year's Day. There are various locations on the island that are closed off to the general public certain times of the year, due to the nesting of a variety of sea birds. Special Programs: There are various ranger-led programs on a daily basis on Alcatraz. Be sure to check out the ranger programs at the dock as soon as you get off the boat for any of the popular programs on the island. For more information on ticket reservation call (415) 981-ROCK  or go to www.alcatrazcruises.com.