The Patapsco River is a significant waterway in Maryland, flowing approximately 39 miles from its source in the Carroll County hills to its confluence with the Chesapeake Bay. It serves as a vital resource for the surrounding communities, providing water for drinking, recreation, and industry. The river is known for its scenic beauty and diverse ecosystems, supporting various wildlife species. It also features several parks and trails, such as the Patapsco Valley State Park, which offers opportunities for hiking, fishing, and camping along its banks.