Historic St. Mary's City outdoor exhibits are closed for the winter.
St. John's Site Museum winter hours: Fridays and Saturdays, 10 a.m. to 4 p.m. January 23 - March 17

18751 Hogaboom Lane St. Mary's City , 20686
06 May 2025
4:30pm - 6:30pm
18751 Hogaboom Lane St. Mary's City , 20686
06 May 2025
4:30pm - 6:30pm
May 6. Member Event. Unlock Nature’s Secrets: Join the Key Swamp Trail Adventure
4:30 p.m. – 6:30 p.m.
Meet at the HSMC Visitor Center. 18751 Hogaboom Lane, St. Mary’s City, Md
Join us for a delightful trail walk on the Key Swamp Trail on Tuesday, May 6th, from 4:30 PM to 6:30 PM. Gather at the Visitor Center for an exciting opportunity to learn how to identify various trees, and their leaves, and discover notable plants and insects along the way. Bring your curiosity and let’s explore the wonders of nature together!
Register: ginger.newman-askew@maryland.gov
Tue, Mar 17, 2026
10:00 AM - 04:00 PM
Wed, May 13, 2026
02:00 PM - 03:30 PM
Wed, Jun 10, 2026
02:00 PM - 03:30 PM
Wed, Jul 8, 2026
02:00 PM - 03:30 PM
Wed, Aug 12, 2026
02:00 PM - 03:30 PM
Wed, Sep 9, 2026
02:00 PM - 03:30 PM
Wed, Oct 14, 2026
02:00 PM - 03:30 PM
