Saint Marys River

(mârˈēz)

1. A river, about 210 km (130 mi) long, rising in southeast Georgia in the Okefenokee Swamp and flowing eastward along the Georgia-Florida border to the Atlantic Ocean.
2. A river, about 120 km (75 mi) long, rising in the eastern Upper Peninsula of Michigan and flowing generally south and southeast to the northern end of Lake Huron. It forms part of the U.S.-Canadian border.