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St. Marys River (Maryland)

St. Marys River
Mouth Potomac River
Location St. Mary's County, Maryland, US
Length 22.3 miles (35.9 km)
Mouth elevation 0 feet (0 m)

The St. Marys River (sometimes spelled St. Mary's River) is a 22.3-mile-long (35.9 km)[1] river in southern Maryland in the United States. It rises in southern St. Mary's County, and flows to the southeast through Great Mills, widening into a tidal estuary near St. Marys City, approximately 2 miles (3 km) wide at its mouth on the Potomac River, near the Chesapeake Bay.

See also


  1. ^ "National Hydrography Dataset high-resolution flowline data". U.S. Geological Survey. Retrieved August 15, 2011. 

External links

  • State of Maryland Geologic Survey: Rivers of Maryland

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