Of the 14 escape attempts in Alcatraz’s history as a federal penitentiary, one stands apart for its violence. In May 1946, a breakout turned into a two-day siege that pulled in the U.S. Marines and left five men dead. It became known as the Battle of Alcatraz — the bloodiest escape attempt the island ever saw.
The Plan
Six inmates, led by Bernard Coy, set out to break off the island. They overpowered guards and seized weapons from the gun gallery — the elevated, caged walkway from which officers watched the cellblocks. With guns in hand, they took control of the cellhouse itself. For a few hours, the most escape-proof prison in America was in the hands of its prisoners.
The One Door They Couldn’t Open
The plan came apart on a detail. The men couldn’t obtain the key to the recreation yard door — the way out to the island’s edge. That single locked door trapped them inside the very cellhouse they had just captured. The escape was over almost as soon as it began; what followed was a siege.
Two Days, and the Marines
The standoff lasted two days. When it became clear the inmates were cornered but armed and dangerous, the response escalated far beyond the island’s own guard force — the U.S. Marines were ultimately brought in to retake the cellhouse. By the time it ended, two correctional officers and three inmates were killed. Two of the surviving inmates were later executed for their roles in the battle.
Why It Still Matters
The Battle of Alcatraz is a reminder of what the island actually was. Alcatraz was built for the prisoners other prisons couldn’t hold — escape risks, troublemakers, and men considered too dangerous for the general population. The 1946 attempt is the starkest proof of how high the stakes ran inside those walls, and of the design that made escape from the cellhouse nearly impossible even when inmates held it.
Where It Sits in Alcatraz’s Escape History
The 1946 battle was the bloodiest of the island’s 14 escape attempts, which involved 36 men across 29 years as a federal penitentiary. Most who tried were caught or shot; a few drowned. Officially, no one ever successfully escaped the island — though the June 1962 disappearance of Frank Morris and the Anglin brothers has never been fully closed and remains one of the great unsolved cases in American history. The 1946 attempt stands apart not for its cleverness but for its violence and the sheer scale of the response it triggered.
See the Site on Your Visit
The “Doing Time” audio tour walks you through the cellblocks and past the gun gallery where the battle began. Standing in those corridors, the story stops being abstract — you can see exactly how six armed men could seize the cellhouse and still have nowhere to go. For the full sweep of escape history, read our guide to every Alcatraz escape attempt, and meet the island’s most notorious residents in famous Alcatraz inmates.
Plan Your Visit
Walk the cellblocks yourself on a day tour, or see them after dark on the night tour. Check the ferry schedule, and if your dates are full, our sold-out guide shows live availability.
We provide genuine reservations and e-tickets for tours, including ferry service, with 24/7 customer support every day, even on holidays. As a private booking company, our goal is 100% customer satisfaction. Please note, we are not affiliated with any government agency or the official box office. Prices at checkout may exceed face value.
