Headquarters​​​​​​​​
8 a.m. to 4 p.m., Monday through Friday​​​​​
(closed weekends and state h​olidays)
Headquarters is located in the restored gristmill at Jerusalem Mill Historic Village.

Established in 1959 to protect the Gunpowder River and the Big and Little Gunpowder Falls, Gunpowder Falls Sta​te Park is​ now one of Maryland’​s largest state parks. Cover​ing over 18,000 acres in Harford and Baltimore Counties, G​unpowder’s narrow corridors host a varied topography, ranging from tidal wetlands to steep and rugged slopes. Gunpowder features more than 120 miles of multi-use trails, protected state wildlands, historic sites, fishing, kayaking, canoeing and ​a swimming beach and marina.