Alcatraz did not start as a prison and did not stay one. Understanding the island means reading it as five overlapping periods, each of which built on — and partly demolished — the one before.
Timeline
| Period | Era | What happened |
|---|---|---|
| 1775 | Naming | Spanish explorer Juan Manuel de Ayala charts the island |
| 1850s | Fortress | US Army fortifies the island; first West Coast lighthouse lit in 1854 |
| 1860s–1933 | Military prison | Used to hold military prisoners, Civil War captives and others |
| 1934–1963 | Federal penitentiary | Maximum-security federal prison for difficult inmates |
| 1969–1971 | Occupation | Indians of All Tribes occupy the island for 19 months |
| 1972–today | National park | Golden Gate NRA established; island opens to visitors in 1973 |
Fortress years
Strategic anxiety after the Gold Rush turned Alcatraz into a defensive post guarding the Golden Gate. Cannon emplacements ringed the island and a lighthouse — the first on the Pacific coast of the United States — went into service in 1854. Almost immediately, the isolation that made it a good fort made it a convenient jail.
The military prison
By the late nineteenth century Alcatraz was a recognised military detention facility. Prisoners included Confederate sympathisers, deserters, conscientious objectors, and Hopi men imprisoned in 1895 for resisting government schooling policy — a detail the occupation of 1969 would later invoke directly.
The federal penitentiary, 1934–1963
The Bureau of Prisons took over and rebuilt the cellhouse to modern maximum-security standards. For 29 years Alcatraz absorbed the federal system's most difficult men. It also generated the escape attempts, the celebrity inmates and the film mythology. Depth on this era: Alcatraz Federal Penitentiary and life inside Alcatraz federal prison.
Closure and the occupation
The prison closed in 1963 on cost grounds and sat empty. In November 1969, activists from Indians of All Tribes landed and claimed the island under a treaty argument, holding it for 19 months. The occupation drew national attention and contributed to the end of the federal termination policy. Painted slogans from the period are preserved on the water tower and buildings.
National park era
Alcatraz became part of Golden Gate National Recreation Area in 1972 and opened to visitors in 1973. Restoration has been continuous since, including the volunteer-led revival of the historic gardens. Today over a million people a year make the crossing from Pier 33.
Reading the island's history on the ground
- Fortress: the citadel foundations beneath the cellhouse and the surviving batteries.
- Military prison: the barracks near the dock.
- Penitentiary: the cellhouse, D Block, the dining hall and the yard.
- Occupation: the red painted messages and the water tower.
- Park: the gardens, trails and seabird colonies.
The full visitor overview lives on Alcatraz Island guide.
Frequently asked questions
How old is Alcatraz prison?
The island has held prisoners since the 1860s as a military facility. The federal penitentiary itself operated from 1934 to 1963.
What was Alcatraz before it was a prison?
A US Army fortification built in the 1850s, and the site of the first lighthouse on the West Coast, lit in 1854.
What was the Native American occupation of Alcatraz?
From November 1969 to June 1971, activists from Indians of All Tribes occupied the island to protest federal policy. It became a landmark moment for Native American rights.
When did Alcatraz open to the public?
In 1973, after the island became part of Golden Gate National Recreation Area in 1972.