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Patapsco Valley State Park extends along 32 miles of the Patapsco River, upstream of where the river flows into the Chesapeake Bay at Baltimore harbour. One of Maryland's first state parks (1907), Patapsco Valley includes five developed recreational areas, providing hiking, fishing, camping, canoeing, horseback and mountain bike trails, as well as picnicking for individuals or large groups in the park's many popular pavilions.
The Patapsco River valley and its natural resources have been used and enjoyed for centuries - by Native Americans, explorers, settlers and now present-day citizens. With its source in Frederick and Carroll counties, the Patapsco is the largest Chesapeake Bay tributary on the western shore between the Patuxent to the south and the Susquehanna to the north.