The Sasanoa River is an 8.6 miles (13.8 km) tidal channel in the Midcoast region of Maine

Maine

Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...

, connecting the Kennebec River

Kennebec River

The Kennebec River is a river that is entirely within the U.S. state of Maine. It rises in Moosehead Lake in west-central Maine. The East and West Outlets join at Indian Pond and the river then flows southward...

 with the Sheepscot River

Sheepscot River

The Sheepscot River is a river in the U.S. state of Maine. Its lower portion is a complex island estuary with connections to the Kennebec River downstream of Merrymeeting Bay.-Route:...

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The Sasanoa River has two distinct sections. The western section begins at the Kennebec River opposite the city of Bath

Bath, Maine

Bath is a city in Sagadahoc County, Maine, in the United States. As of the 2000 census, the city population was 9,266. It is the county seat of Sagadahoc County. Located on the Kennebec River, Bath is a port of entry with a good harbor. The city is popular with tourists, many drawn by its...

 and runs east, forming the boundary between the towns of Arrowsic

Arrowsic, Maine

Arrowsic is a town in Sagadahoc County, Maine, United States. The population was 477 at the 2000 census. It is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area. During the French and Indian Wars, Arrowsic was site of a succession of important and...

 and Woolwich

Woolwich, Maine

Woolwich is a town in Sagadahoc County, Maine, United States. The population was 2,810 at the 2000 census. It is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area...

, and passing through its narrowest channel at Upper Hell Gate. The western section ends at Hockomock Bay, a water body also crossed by the Back River

Back River (Kennebec River)

The Back River is a waterway in coastal Maine, in the combined estuary of the Sheepscot and the Kennebec rivers. The Back River runs from Wiscasset on the Sheepscot to Georgetown on the Kennebec, intersecting another channel, the Sasanoa River, at Hockomock Bay.Maine State Route 144 bridges the...

 and containing numerous tidal inlets. The eastern section of the Sasanoa River begins 1 miles (1.6 km) northeast of the river's western section and flows southeast through Lower Hell Gate and Goose Rock Passage to the Sheepscot River. This section of the river forms the boundary between Lincoln

Lincoln County, Maine

Lincoln County is a county located in the U.S. state of Maine. As of 2010, the population was 34,457. Its county seat is Wiscasset. It was founded in 1760 and named after the English city Lincoln. At its founding, it accounted for three-fifths of the State's land, and stretched east to Nova...

 and Sagadahoc

Sagadahoc County, Maine

Sagadahoc County is a county located in the U.S. state of Maine. As of 2010, the population was 35,293. Its county seat is Bath. In total area, it is the smallest county in Maine....

 counties, as well as between the towns of Westport and Georgetown

Georgetown, Maine

Georgetown is a town in Sagadahoc County, Maine, United States. The population was 1,020 at the 2000 census. Home to Reid State Park, the town is part of the Portland–South Portland–Biddeford, Maine Metropolitan Statistical Area...

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