The Castle Island Association (CIA), established in 1977, is a fantastic group of volunteers dedicated to preserving the spirit of Fort Independence. Since spring 1981, the CIA has offered guided tours that share the rich history of this important landmark. Because of their hard work, Fort Independence remains a beloved treasure in Boston.

The Association’s mission is to “…enhance and maintain the Castle Island facility and the Fort, a public space on Boston Harbor, while educating everyone about the historical importance of Castle Island and the Fort…” The volunteers at Castle Island bring a lot of enthusiasm and passion to their tours. Bill Spain, President of the Castle Island Association, generously shares his knowledge with every volunteer. He teaches them about the fascinating history of the fort and the island, making each visit truly special for you, the visitor.

Hours of Free Tours at Fort Independence for 2026

Here is schedule for tours and events in 2026

We’d like to remind everyone that the weather can really affect our events.

From June to August 2026, we will offer tours on Saturdays and Sundays from 12:00 to 3:00 PM, starting on Memorial Day weekend. After Labor Day weekend, these tours will be available on Sundays only during the same hours.

We’re also thrilled to announce that the Thursday Twilight Skyline Viewing will return! Starting in late May, you can join us at 7:00 PM until dusk. This special event will take place only in June and July. Enjoy the stunning sunset over the Boston skyline. Watch planes take off and land near the Fort. Experience one of the best views of the bustling Boston Harbor.

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