All parks › Castillo de San Marcos National Monument
Castillo de San Marcos National Monument: fees, hours, camping and when to visit
Castillo de San Marcos National Monument is a National Park System unit in Florida[3]. NPS lists a $15 entrance fee per person for adults aged 16 and above, and the fort is open 7 days a week except Thanksgiving Day and Christmas Day[4][5].
Entrance fees and passes
Fees as listed by the National Park Service. Fees change, so confirm on the park's official fees page before you go.
The America the Beautiful pass is accepted here[7].
Entrance fee payment is cashless (card or mobile payment)[8].
America the Beautiful passes cover entrance fees at national parks and other federal recreation sites.
| Pass | Who can get it | Price |
|---|---|---|
| Resident Annual Pass[9] | US citizens and residents | $80 |
| Non-Resident Annual Pass[9] | Non-US residents | $250 |
| Senior Annual Pass[9] | US citizens and residents 62+ years old | $20 |
| Senior Lifetime Pass[9] | US citizens and residents 62+ years old | $80 |
| Military Annual Pass[9] | Current US military and dependents | Free |
| Military Lifetime Pass[9] | Gold Star Family members and veterans | Free |
| Access Pass[9] | US citizens and residents with permanent disability | Free |
| 4th Grade Pass[9] | US 4th graders | Free |
| Volunteer Pass[9] | Federal recreation site volunteers with 250 service hours | Free |
When to visit and hours
NPS lists the first admission time as 9:00 am[5] and the last as 5:00 pm[5]. The fort closes at 5:15 pm[5], and visitors must exit by then. NPS also notes a limit of 100 visitors inside the historic fort at one time[5]. In 2025 the busiest month was March with 76,292 recreation visits[1]. The quietest month was October with 6,839 visits[1]. NPS describes summers from May to September as hot and humid with afternoon thunderstorms common[10]. Spring and autumn can be pleasant, and the winter months are described as dry and sometimes cool[10].
Show visits by month
| Month, 2025 | Recreation visits |
|---|---|
| January | 57,790 |
| February | 57,701 |
| March | 76,292 |
| April | 58,256 |
| May | 46,588 |
| June | 45,500 |
| July | 47,368 |
| August | 37,199 |
| September | 42,403 |
| October | 6,839 |
| November | 52,328 |
| December | 69,806 |
Pets and dogs
The national NPS rule says that where pets are allowed they must be kept in a crate or cage, or on a leash of six feet or less[11]. Pets are not allowed in public buildings, with service animals excepted[11]. Each park can close more areas to pets, so check with the park before you bring a dog[11].
Before you go
- NPS says this is a walk-in park, and the entrance fee applies to each individual[4].
- Entrance fees are cashless, so bring a card or mobile payment[8].
- The Annual Entrance - Park pass costs $45 and covers entrance fees only at this monument[6].
- The park accepts the America the Beautiful pass for entrance[7].
- Fees and hours change, so confirm them on the official NPS park page before your trip[4][5].
Questions people ask
- How much does it cost to enter Castillo de San Marcos?
- NPS lists $15 per person for adults aged 16 and above, valid for 7 consecutive days[4]. NPS says children aged 15 and under are admitted free[4].
- Does Castillo de San Marcos accept the America the Beautiful pass?
- Yes, NPS lists the park as accepting the America the Beautiful pass for entrance[7]. NPS lists the Resident Annual Pass at $80[9].
- What are the hours at Castillo de San Marcos?
- NPS lists the park as open 7 days a week except Thanksgiving Day and Christmas Day[5]. Entry begins at 9:00 am[5] and the last entry is 5:00 pm[5].
Facts and sources
- NPS recreation visits by month, 2025 (chart on this page). NPS Visitor Use Statistics
- NPS recreation visits per year: 2021: 498,623, 2022: 624,841, 2023: 646,703, 2024: 579,825, 2025: 598,070. NPS Visitor Use Statistics
- Castillo de San Marcos National Monument is a unit of the U.S. National Park System (designation: National Monument) in Florida. National Park Service
- Entrance fee, Per Person: $15. National Park Service
- Operating hours, Castillo de San Marcos National Monument: 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... National Park Service
- Annual Entrance - Park: $45. National Park Service
- Castillo de San Marcos National Monument accepts the America the Beautiful (interagency) pass for entrance. National Park Service
- Entrance fees at Castillo de San Marcos National Monument are cashless (cards or mobile payment, no cash) according to NPS. National Park Service
- America the Beautiful pass prices (table on this page). NPS Passes
- NPS weather and seasons overview for Castillo de San Marcos National Monument. National Park Service
- National Park Service rule 36 CFR 2.15: where pets are allowed they must be crated, caged or on a leash no longer than six feet at all times, and pets are not allowed in public buildings, on public transportation or on designated swimming beaches (service... eCFR, 36 CFR 2.15