Little Alcatraz Little Alcatraz Little Alcatraz is a small rock in San Francisco Bay roughly off the Model Industries Building off northwest coast of Alcatraz Island. Due to its proximity to the island it is known by this name, but it was formerly known as Paul Pry Rock due to the steamer "Paul Pry" striking it on December 22, 1862 with some 150 men on board. On January 14, 1868, the 700 ton British ship, "Oliver Cutts", struck the rock and sank. Since it is submerged at high tides, Little Alcatraz is still routinely struck by small pleasure boats. The rock is
Alcatraz Federal Penitentiary Alcatraz Federal Penitentiary The Alcatraz Federal Penitentiary or United States Penitentiary, Alcatraz Island (often just referred to as Alcatraz or The Rock) was a maximum high-security federal prison on Alcatraz Island, off the coast of San Francisco, California, which operated from August 11, 1934, until March 21, 1963. The main prison building was built in 1910–1912 during its time as a United States Army military prison; Alcatraz had been the site of a citadel since the 1860s. The United States Disciplinary Barracks, Pacific Branch on Alcatraz had been acquired by the United States Department of Justice on October 12, 1933,