Alcatraz Island packs an improbable amount of American history into 22 acres of rock in San Francisco Bay. It has been a Civil War-era fortification, a military prison, the most famous federal penitentiary in the country, the focus of a landmark Native American protest, and — for over fifty years now — a national park site visited by well over a million people a year.
Island facts at a glance
| Location | San Francisco Bay, about 1.25 miles offshore |
| Size | About 22 acres |
| Highest point | Roughly 135 feet above sea level |
| Federal penitentiary years | 1934–1963 |
| Native American occupation | November 1969 – June 1971 |
| Opened to the public | 1973, as part of Golden Gate National Recreation Area |
| Access | Ferry from Pier 33 Alcatraz Landing only |
The layers of Alcatraz history
Fortress and lighthouse
The US Army fortified the island in the 1850s, and Alcatraz carried the first lighthouse on the West Coast. Gun batteries and the citadel foundations still underlie later structures.
Military prison
By the late nineteenth century the island's isolation had made it a natural detention site, holding Civil War prisoners, conscientious objectors and, at times, Native American prisoners.
The federal penitentiary
From 1934 to 1963 Alcatraz operated as a maximum-security federal prison for men who had proved difficult elsewhere. This is the era most visitors come for — covered in depth on Alcatraz Federal Penitentiary and Alcatraz prison history.
The occupation
In November 1969, a group calling itself Indians of All Tribes occupied the island for 19 months, a protest that helped reshape federal policy toward Native American self-determination. Their painted messages remain visible today.
National park
The island joined Golden Gate National Recreation Area in 1972 and opened to visitors the following year. It is now managed by the National Park Service.
What to see on the island today
- The main cellhouse and the Doing Time audio tour.
- D Block, the recreation yard and the dining hall.
- The escape cells associated with the 1962 escape.
- The Warden's House ruins and the lighthouse.
- Historic gardens maintained by volunteers.
- Occupation-era murals and exhibits.
- Seabird colonies and Bay views in every direction.
Planning your visit
Ferries leave from Pier 33, crossings take 15 minutes, and a typical visit runs two and a half to three hours. Start with visiting Alcatraz for the practical brief and Alcatraz tickets for booking.
Why the island still matters
Alcatraz works as a visit because it refuses to be one story. The same corridor can hold the mythology of Capone-era incarceration, the reality of routine and boredom, and the political claim staked in 1969. Standing in the recreation yard with the San Francisco skyline in full view is the clearest expression of what made this prison different: not distance, but proximity.
Frequently asked questions
What is Alcatraz Island known for?
It is best known as the federal penitentiary that operated from 1934 to 1963, holding high-profile inmates including Al Capone and Robert Stroud.
How big is Alcatraz Island?
About 22 acres, rising roughly 135 feet above San Francisco Bay.
Who owns Alcatraz Island today?
It is federal land managed by the National Park Service as part of Golden Gate National Recreation Area.
Can you stay overnight on Alcatraz?
No. All visitors leave on the last scheduled ferry; only night tours extend into the evening.