The St. Marys River (sometimes spelled St. Mary's River) is a river in southern

Maryland Maryland ( ) is a state in the Mid-Atlantic region of the United States. It shares borders with Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware and the Atlantic Ocean to ...

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. It rises in southern St. Mary's County, and flows to the southeast through Great Mills, widening into a tidal

estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environment ...

near

St. Mary's City St. Mary's City (also known as Historic St. Mary's City) is a former colonial town that was Maryland's first European settlement and capital. It is now a large, state-run historic area, which includes a reconstruction of the original colonial se ...

, approximately wide at its mouth on the north bank of the

Potomac River The Potomac River () drains the Mid-Atlantic United States, flowing from the Potomac Highlands into Chesapeake Bay. It is long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map. Retrieved Augus ...

, near the

Chesapeake Bay The Chesapeake Bay ( ) is the largest estuary in the United States. The Bay is located in the Mid-Atlantic (United States), Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula (including the parts: the ...

to the east.

References

Chesapeake Bay watershed Tributaries of the Potomac River Rivers of Maryland Rivers of St. Mary's County, Maryland St. Mary's City, Maryland {{Maryland-river-stub

See also

References