Free Admission to the Castillo de San Marcos 2026

Mark your calendar so you don’t miss the Free Admission to the Castillo de San Marcos!  There are several days in 2026.  So … Take advantage and come experience this National Park.

In fact, all National Park Service sites that charge an entrance fee will offer free admission to everyone.  Please Note: other fees, including timed entry or reservation fees, may apply.

Days with Free Admission

May 25 — Memorial Day
June 14 — Flag Day
July 3-5 — Independence Day Weekend
August 25 — 110th Birthday of National Park Service
September 17 — Constitution Day
October 27 — Theodore Roosevelt’s Birthday
November 11 — Veterans Day

Operating Hours:
First admission is at 9:00am | Last admission is at 5:00pm
The Castillo closes and all visitors must exit at 5:15pm

Click the event website link for all additional information.