The Medomak River, historically known as the Muscongus River, is a 40-mile-long (64 km) river in Maine. From its source (44°21′48″N 69°21′09″W / 44.3634°N 69.3524°W) in Liberty, the river winds 32 miles (51 km) south to the head of its tidal river estuary in Waldoboro, then about 8 miles (13 km) south to Bremen. The river flows through Hockomock Channel into the head of Muscongus Bay. Medomak is Abenaki for "place (river) of many alewives".