Entrance
The Castillo de San Marcos is considered to be a "walk-in" park. The entrance fee applies to each individual.
Adults (Age 16 and above) entrance is $6.00 – valid for 7 days.
Children (age 15 and under) are admitted free of charge but must be accompanied by an adult.
The Golden Access and Age Passports; the Castillo Annual Pass; and the Interagency Access, Annual, and Senior Passes are honored for free admission in accordance with the terms specified on the card.
Learn about the Interagency Passes .
Parking
The parking lot at the Castillo is designed to accommodate visitors only while they are in the fort. It is metered parking, $0.50 per hour, with a maximum of two hours time.
If you are planning on visiting the rest of St. Augustine you may want to consider using the city's parking garage which is only a block away from the Castillo.