Maryland

Maryland

Gunpowder Falls State Park

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Established
1959
Acreage
15,088 · 15,088 acres across six non-contiguous areas in northeastern Baltimore and western Harford counties; established 1959 to protect the Big and Little Gunpowder Falls valleys
Location
Baltimore and Harford counties, MD (greater Baltimore area, north and east of the city)
Key features
Hammerman Area Chesapeake Bay beach; Hereford Area trails; Jerusalem Mill Village (1772 gristmill, NRHP); Sweet Air; Pleasantville; Dundee Creek Marina; trout streams
Activities
Swimming (Hammerman Beach), fishing (trout, smallmouth bass), tubing, kayaking, hiking 100+ mi of trails, mountain biking, horseback riding, history programs
Notable
Maryland's largest state park (15,088 acres in six discontinuous units); the Jerusalem Mill Village inside the park is one of the oldest 18th-century mill complexes still standing on its original foundation

Visits

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Source: dnr.maryland.gov · 2026-05-14