The St. John's Site Museum will close at 1:00 p.m. on Friday, July 17, 2026.
AIR QUALITY ALERT: Due to the poor air quality for Friday, July 17, the outdoor exhibits will be closed. Guests are encouraged to talk with staff inside St. John's Site Museum, the Visitor Center on Hogaboom Lane, or the Farthing's Pub room.
October 18, 2025 | 5:00 p.m. – 8:00 p.m. Family-friendly | G-rated | Costumes encouraged Entrance closes at 7:30 p.m.
Step into the Lost City, a spooky (but not scary!) trick-or-treating adventure set in the historic Town Center at Historic St. Mary’s City. This family-friendly event is perfect for little goblins and ghouls looking for Halloween fun in a safe and scenic setting.
Wander along lantern-lit paths collecting treats, play games, talk with pirates, have your fortune told, and enjoy seasonal activities for all ages. Costumes are encouraged for kids and grown-ups alike!
Important Info:
Gates open at 5:00 p.m.
Last entry is at 7:30 p.m.
Activities conclude at 8:00 p.m.
Free parking in the State House lot (GPS: 47418 Old State House Rd, St. Mary’s City, MD 20686)