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Castillo De San Marcos National Monument

Saint Augustine, Florida · St. Johns County

Built by the Spanish in St. Augustine to defend Florida and the Atlantic trade route, Castillo de San Marcos National Monument preserves the oldest masonry fortification in the continental United States and interprets more than 450 years of cultural intersections.

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29.89786, -81.31217
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About Castillo De San Marcos National Monument

Built by the Spanish in St. Augustine to defend Florida and the Atlantic trade route, Castillo de San Marcos National Monument preserves the oldest masonry fortification in the continental United States and interprets more than 450 years of cultural intersections.

How to Get There

On State Route A1A overlooking Matanzas Bay in the heart of the historic district of Saint Augustine, the Castillo is approximately a five mile drive from Interstate 95.

Driving directions (Google Maps) →

Plan Your Visit to Castillo De San Marcos National Monument

Heading to Castillo De San Marcos National Monument? A few things to know before you go:

  • Reservations: popular sites fill up fast — check Recreation.gov 6 months in advance
  • Fees: day-use and camping fees vary; check current rates on the official park page
  • Trash & pack-out: follow Leave No Trace principles
  • Wildlife: store food in bear boxes where provided; never feed wildlife
  • Weather: the 5-day forecast above is updated every 6 hours; verify just before you go

Frequently Asked Questions

Do I need a reservation for Castillo De San Marcos National Monument?

No central reservation system listed for Castillo De San Marcos National Monument. Check the official page (https://www.recreation.gov/recarea/2620) for the latest entry policy and availability.

How do I get to Castillo De San Marcos National Monument?

On State Route A1A overlooking Matanzas Bay in the heart of the historic district of Saint Augustine, the Castillo is approximately a five mile drive from Interstate 95.

How do I contact Castillo De San Marcos National Monument?

You can reach the park at phone: (904) 829-6506 or email: casa_ranger_activities@nps.gov.