National Park Service, Florida.
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.
The monument is currently open for visitors. However, due to uncertainties around COVID-19, entry passes are not available for purchase on Regreation.gov. Local managers are committed to the health and safety of recreational visitors and our staff. We are following the guidelines from our agency and the CDC regarding COVID-19, closely monitoring the situation and responding to current conditions. Please continue to monitor this page for status updates.
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.