The
Saint George River is a river in
Maine with a watershed of in a unique and historic area of mountains, sea coast, lakes, tidal streams and inlets. The origin of the Saint George River is the outflow of Saint George Lake in
Liberty. The river follows a winding course south to
Thomaston, where the river flows into the estuary and runs about miles southwest to
Muscongus Bay, forming the border between
Cushing and
St. George.