Castillo de San Marcos National Monument
National Monument · FL
Park Closure · Construction for Seawall Project
Starting July 27, 2026, Castillo de San Marcos National Monument will begin construction to replace, raise and rehabilitate the park’s failing seawalls. The historic fort will remain accessible throughout the project. Some areas outside of the fort will be closed for safety.
1 noticefrom the National Park Service
Information · Fee Stations Credit Card Only
Fee Stations are only accepting credit cards for the purchase of entry tickets and passes.
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.
- NPS site
- nps.gov/casa
- Location
- Castillo de San Marcos National Monument (29.898, -81.312)Directions
Track your visit to Castillo de San Marcos National Monument
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Passport stamp locations
- Museum Store
Hours
Castillo de San Marcos National Monumenttoday: 9:00AM - 5:00PM
- Sat Oct 39:00AM - 5:00PM
- Sun Oct 49:00AM - 5:00PM
- Mon Oct 59:00AM - 5:00PM
- Tue Oct 69:00AM - 5:00PM
- Wed Oct 79:00AM - 5:00PM
- Thu Oct 89:00AM - 5:00PM
- Fri Oct 99:00AM - 5:00PM
The Castillo de San Marcos is open to the public 7 days per week, except Thanksgiving Day (fourth Thursday in November) and Christmas Day (December 25). A maximum capacity of 100 visitors in the historic fort at any time will be in effect. First admission is at 9:00 a.m. and last admission is at 5:00 p.m. The Castillo closes and visitors must exit at 5:15 p.m. The park grounds are closed from midnight until 5:30 a.m.
Hours are retrieved from the National Park Service and can change without notice — check the official site before you go.
Self-guided tours
4
Artillery Collection Tour30–60 minutes · 1 stop
This is a walking tour of all the Cannons and Mortars on display here at Castillo de San Marcos. It begins at the top of the stairs and next to the flagpole.
Exterior Exhibit: Self-Guided Tour45–60 minutes · 12 stops
If Castillo de San Marcos is closed, check out these locations that are available to visit. This tour begins at the south end of the property, near the parking lot and ends at the City Gate, across the street from Castillo de San Marcos. Please remember to be careful and watch your step as this tour traverses uneven ground. And only use the designated crosswalks when walking across the street.
Interior Rooms: Self-Guided Tour45–60 minutes · 20 stops
This tour takes you through the Castillo's interior rooms and gundeck. It walks you through a basic overview of the fort's near 350 years of history. The tour begins after you cross the moat and step inside the fortress. Enjoy!
Interior Wayside Exhibit - Self-Guided Tour15–30 minutes · 8 stops
This guide walks you through some of the unique interior wayside exhibits at Castillo.
Entrance fees
2
- Per Person — $15.00
The Castillo de San Marcos is considered to be a "walk-in" park. The entrance fee applies to each individual. Tickets are not transferable and cannot be given to other guests. Adults (Age 16 and above) entrance is $15.00 and valid for 7 consecutive days. Children (age 15 and under) are admitted free of charge but must be accompanied by an adult.
- Annual Entrance - Park — $45.00
Pass covers entrance fees only at Castillo de San Marcos National Monument. Pass allows one passholder to print and sign their name and is valid for 12 months through the month of purchase. Pass covers the passholder and three additional adults (16 and over) when entering the Castillo.