Question: What is the name of the Island located in San Francisco Bay, 1.25 miles offshore, with facilities for a lighthouse, a military prison, and the Parade Grounds, a large concrete open area?

Context paragraphs:
Alcatraz Island Light: Alcatraz Island Lighthouse is a lighthouse – the first one built on the U.S. West Coast – located on Alcatraz Island in California's San Francisco Bay.  It is located at the southern end of the island near the entrance to the prison.  The first light house on the island was completed in 1854, and served the bay during its time as a Citadel and military prison.  It was replaced by a taller 95 ft above mean sea level) concrete tower built in 1909 to the south of the original one which was demolished after it was damaged due to earthquake in 1906.  The automation of the lighthouse with a modern beacon took place in 1963, the year Alcatraz closed as the Alcatraz Federal Penitentiary.  It is the oldest light station on the island with a modern beacon and is part of the museum on the island.  Although when viewed from afar it easily looks the tallest structure on Alcatraz, it is actually shorter than the Alcatraz Water Tower, but as it lies on higher ground it looks much taller.

Former Military Chapel (Bachelor Quarters): The Former Military Chapel (Bachelor Quarters) is a building on Alcatraz Island off the coast of San Francisco, United States.  It is located next to the Sally Port and Dock and the Building 64 residential apartments.  It was built in the 1920s in the mission-revival style to accommodate for the officers at the military prison on the island.  The ground floor had quarters for the officers and their families who worked at the military prison and the top floor was used as a school and chapel.  It functioned as a Sunday School for children of the military personnel on Sundays.

San Rafael Creek: San Rafael Creek is a watercourse in Marin County, California, United States that discharges to San Rafael Bay, a small embayment of the San Francisco Bay.  The mouth of San Rafael Creek is a channelized estuary through an industrial area.  San Rafael Creek has a designation under Federal Law Section 303(d) as impaired by diazinon, the principal pollutant causing impairment designations for streams discharging to San Pablo Bay, which is the northern arm of San Francisco Bay.  In September 2007, the organization Save The Bay designated San Rafael Creek as one of the top ten "worst trash hot spot" waterways flowing into the San Francisco Bay.  The channel portion of San Rafael Creek below the Grand Street Bridge is dredged on a regular maintenance schedule to keep the shallow draft channel navigable.  Dredge spoils are disposed of at a site near Alcatraz Island.

Alcatraz Citadel: Alcatraz Citadel, also known as Fort Alcatraz, was the original military defense and prison on Alcatraz Island, off the coast of San Francisco, California, United States.  The citadel was built in 1859 as a U.S. Army military defense, and began function as a war camp in 1861 and long-term military prison in 1868.  During the American Civil War, the citadel and its batteries provided an important line of defense.  The island continued to develop in the 1870s and 1880s, and in 1893, the first hospital on Alcatraz opened.  A new upper prison was built in 1904, but after the citadel ceased function as a military defense in 1907 and the original citadel collapsed the following year, a $250,000 concrete military prison was erected between 1910 and 1912.  In 1933-4, this was modernized and became the Alcatraz Federal Penitentiary.  It housed some of America's most dangerous criminals between 1934 and 1963.

Parade Grounds: The Parade Grounds is a large concrete open area on the south end of Alcatraz Island, off the coast of San Francisco, USA.  They lie beyond Building 64.  They were originally built in the 1860s on a barren site by the U.S. military who used the site for military drills and parades.

Alcatraz Island: Alcatraz Island ( ) is located in San Francisco Bay, 1.25 mi 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.  Beginning in November 1969, the island was occupied for more than 19 months by a group of Native Americans from San Francisco, who were part of a wave of Native activism across the nation, with public protests through the 1970s.  In 1972, Alcatraz became part of a national recreation area and received designation as a National Historic Landmark in 1986.

San Francisco Bay Area Water Trail: The San Francisco Bay Area Water Trail is a growing network of launch and landing sites that allow people in non-motorized small boats and beachable sail craft such as kayaks, canoes, dragon boats, stand up paddle and windsurf boards, to safely enjoy San Francisco Bay through single and multiple-day trips.  The Water Trail is enhancing Bay Area communities’ connections to the Bay and creating new linkages to existing shoreline open spaces and other regional trails as well as increasing education about personal safety, navigational safety, and appropriate boating behavior near sensitive wildlife species and shoreline habitat.  The Water Trail is implemented under the leadership of the California Coastal Conservancy in close collaboration with the Association of Bay Area Governments, the San Francisco Bay Conservation and Development Commission, and the California Department of Boating and Waterways.

Oakland, California: Oakland is the largest city and the county seat of Alameda County, California, United States.  A major West Coast port city, Oakland is the largest city in the East Bay region of the San Francisco Bay Area, the third largest city overall in the San Francisco Bay Area, the eighth largest city in California, and the 45th largest city in the United States, with a population of 419,267 as of 2015 .  It serves as a trade center for the San Francisco Bay Area; its Port of Oakland is the busiest port in the San Francisco Bay, the entirety of Northern California, and the fifth busiest in the United States of America.  The city was incorporated in 1852.

Sand Island Light (Alabama): Sand Island Light is a decommissioned lighthouse located at the southernmost point of the state of Alabama, United States, near Dauphin Island, at the mouth of Mobile Bay, Alabama.  It is located roughly three miles offshore from the primary Mobile Bay entrance, bounded on the east by Mobile Point and on the west by Dauphin Island.  The lighthouse is 132 ft high.

Cape Florida Light: The Cape Florida Light is a lighthouse on Cape Florida at the south end of Key Biscayne in Miami-Dade County, Florida.  Constructed in 1825, it guided mariners off the Florida Reef, which starts near Key Biscayne and extends southward a few miles offshore of the Florida Keys.  It was operated by staff, with interruptions, until 1878, when it was replaced by the Fowey Rocks lighthouse.  The lighthouse was put back into use in 1978 by the U.S. Coast Guard to mark the Florida Channel, the deepest natural channel into Biscayne Bay.  They decommissioned it in 1990.

Supporting paragraphs: Parade Grounds Alcatraz Island
Answer: Alcatraz Island