Alcatraz Island is located in California, San Francisco Bay, 1.25 miles (2.01 km) offshore from San Francisco, California, United States. The small island was developed with facilities for a lighthouse, a military fortification, a military prison (1868), and a federal prison from 1934 until 1963. Today, the island's facilities are managed by the National Park Service as part of the Golden Gate National Recreation Area; it is open to tours.
