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United States Rivers

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St. Marys River

StatesMaryland
Length27.0 miles
Watershed Length*27 miles
MouthPotomac River ⤏ Atlantic Ocean
GNIS594944
— Watercourse ‐ ‐ ‐ Watershed

* Note: Watershed is mostly rivers/streams 15+ miles in length.


Data from United States Geological Survey