Patuxent River
The
Patuxent River is a
tributary of the
Chesapeake Bay in the state of
Maryland. Its source is located in the hills of the Maryland
Piedmont near the intersection of four counties,
Howard County, Maryland,
Frederick County, Maryland,
Montgomery County, Maryland and
Carroll County, Maryland. Flowing in a generally southward direction, the Patuxent crosses the heavily urbanized corridor between
Baltimore and
Washington, D.C and opens up into a navigable estuary near the town of Deep Landing in
Calvert County, Maryland, finding the Chesapeake Bay about thirty miles later.
The river marks the boundary between the counties containing suburbs of Washington, D.C. and those containing suburbs of Baltimore.