National Park Service · Florida
The oldest masonry fort in the continental US, built of coquina shellstone on the St. Augustine waterfront. A flat-fee ticket good for seven days, with cannon firings on weekends.
Field briefing
Castillo de San Marcos National Monument changes fast with season and elevation.
Before you go
Entry runs about $15 for adults and the ticket is good for seven days, so you can return without paying again. Visitors 15 and younger and national park pass holders enter free, and the waterfront lot charges by the hour for parking. Come early to beat the Florida heat on the exposed gun deck, and check the calendar for the weekend cannon firings, which are the highlight when they run.
The landmarks worth the trip. Tap any photo to enlarge.
Weather, crowds, and what the season changes about the trip.
Warm and pleasant, with comfortable fort walking and rising crowds toward summer.
Pack Sun protection and water for the exposed gun deck, plus comfortable shoes.
Hot and humid, with strong sun on the open ramparts and afternoon storms.
Pack Sun shirt, water, and an early visit before the heat and storms build.
Warm and easing, with good weather and lighter crowds outside holiday weekends.
Pack Sun protection and a light rain layer for passing showers.
Mild and pleasant, often the most comfortable time to tour the fort.
Pack A warm layer for breezy days on the waterfront and the gun deck.
The coquina walls and gun deck
The fort's signature shellstone walls and the upper gun deck, with cannons and harbor views over Matanzas Bay.
Weekend cannon firings
Costumed crews fire the historic weapons on scheduled weekends. Check the calendar, since it is the highlight when it runs.
Interior rooms and exhibits
The vaulted rooms around the central plaza, with exhibits on the fort's Spanish, British, and American history.
Put the timed or highest-demand stop first, then keep the rest of the day close and low-friction. For one day in Castillo de San Marcos National Monument, time The coquina walls and gun deck first, then keep Weekend cannon firings and Interior rooms and exhibits close enough that the visit still feels relaxed.
Turn Castillo de San Marcos's conditions into water, pack, and sleep-system decisions.
Build around conditions
Let season, elevation, and weather set the plan.
Plan your trip
2 quick tools, already seeded for Castillo de San Marcos National Monument. Tune the numbers around temperature swings, footing, layers, and how much margin the route needs.
Start with the gear decisions this park changes: footing, weather, camping, and water.
Kit Authority
Castillo de San Marcos National Monument packing list
0 of 14 packed. Check items as you pack, then take this list to the store, trailhead, or campsite.
Pack planning
Use this as a constraint check while you are still shaping the trip. The active checklist becomes useful once your route, dates, and sleep plan are set.
Checklist mode
14 items, grouped for the trip you are actually taking.
The buying guides that match what Castillo de San Marcos asks of your kit, with our current top picks across budget and use case.
There is no lodging or camping at the monument, which sits in downtown St. Augustine. The historic district right around the fort is full of inns, bed-and-breakfasts, and hotels within walking distance. Campers use the Florida state parks and private campgrounds around St. Augustine, including Anastasia State Park across the bay, which adds beach camping a short drive away.
Camping reservations
Castillo de San Marcos is a downtown, day-use monument with no camping. Stay in St. Augustine's historic district, and campers use nearby state parks and private campgrounds.
Reviewed June 11, 2026
Booking window
Anastasia State Park camping reserves through the Florida state park system up to 11 months ahead. Private campgrounds and town lodging book directly.
Where to book or verify
Official National Park Service planning page for hours, fees, and cannon-firing schedules.
Closest public campground, with beach access, reserved through the Florida state park system.
Check for federal campground, backcountry, tour, and permit inventory tied to this park.
Campgrounds to know
Plan the handoff from arrival to shuttle.
Parking, pedestrian entrances, and shuttle timing decide how calmly the first morning starts.
Getting there
Arrival note
The fort sits on the St. Augustine waterfront in northeast Florida, about an hour from Jacksonville.
Car strategy
Most visitors drive and use the paid waterfront lot or a nearby downtown garage, since street parking is scarce in the historic district.
Local movement
Once parked, the fort and the old city are easily walkable together.
Pair this with lodging: sleep where the park transfer is simple, especially if your route needs an early start.
Entry is about $15 for adults 16 and older, and the ticket is good for seven days. Visitors 15 and younger and national park pass holders enter free. Waterfront parking near the fort is paid by the hour.
No. The fort is a downtown, day-use monument with no camping. Anastasia State Park across the bay is the closest public camping, and St. Augustine has private campgrounds and abundant historic-district lodging.
Costumed crews fire the historic weapons on scheduled weekends. Check the official calendar before your visit, since the firings are the highlight but do not run every day.
March to May and September to November bring the most comfortable weather. In any season, arrive near opening to tour the exposed gun deck before the Florida heat and crowds build.