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.
Yes — your pass gets you in.
Your pass covers the $15 park entrance fee.
- Fee type Entrance fee — The standard per-vehicle park entrance fee. Entrance - Per Person: $15
- HoursThe 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
- Source National Park Service ↗
- Last verifiedJuly 6, 2026 · Confirmed
- Official pagewww.nps.gov ↗
- Contact 9048296506 · casa_ranger_activities@nps.gov
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.
Common questions
Quick Yes / No / Depends answers for Castillo de San Marcos National Monument — always confirm with the managing site before you go.
Yes Does the America the Beautiful pass work at Castillo de San Marcos National Monument?
Yes — your pass covers the entrance fee here.
Yes Are there hiking trails?
Yes — trails here include Fort Walking Trail. Check length and difficulty before you go.
Depends Can you bring a dog?
Usually only leashed and in developed areas, campgrounds, and paved paths — not on most trails or in buildings. Pet rules vary by park, so check first.
No Are drones allowed?
No — launching, landing, or operating drones is prohibited on National Park Service land.
Depends What are the hours?
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
Nearby sites
NPS Photo National Park Service Fort Matanzas National Monument
ConfirmedFree entry — there is no entrance fee here, so you won’t need your pass to get in.
NPS Photo/Darryl Herring National Park Service Timucuan Ecological & Historic Preserve
ConfirmedFree entry — there is no entrance fee here, so you won’t need your pass to get in.
