• Cannon firing on the gundeck of the Castillo de San Marcos

    Castillo De San Marcos

    National Monument Florida

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  • Summer Weather

    Afternoon Thunderstorms can create dangerous amounts of lightning strikes. If Lightning is visible from the Castillo, Gundeck closures will take place. Click this link for the local weather forcast. More »

Plan A Field Trip

Effective October 1st, 2013 Castillo de San Marcos NM has updated its Academic Fee Waiver process.

If you tour the Castillo de San Marcos NM with a Commercial Tour Guide you do not qualify for an Educational Fee Waiver.


For an Academic Fee Waiver form click here.


For the National Park Service Guidlines on Academic Fee Waivers click here.


While your group is visiting the Castillo de San Marcos NM, we ask that you follow these rules. Click here


If you have any questions please call 904-829-6506, x239 or e-mail us.

Did You Know?

The Stone walls of the Castillo de San Marcos glow in the evening sun

The Castillo de San Marcos was known as Fort Marion from 1821 through 1942. Its name had been changed to honor America’s famous Revolutionary War hero, Francis Marion. It regained its original name during WWII. Castillo de San Marcos National Monument, Florida