The Bagaduce River is a tidal river

Tidal river

A tidal river is a river, or more typically a stretch of a river, whose flow and level is influenced by tides. An example of a tidal river is the portion of the Connecticut River flowing from Windsor Locks, Connecticut, to the Atlantic Ocean. The Brisbane River, which flows into the Pacific Ocean...

 in the Hancock County

Hancock County, Maine

Hancock County is a county located in the U.S. state of Maine. As of 2010, the population was 54,418. Its county seat is Ellsworth. It was incorporated on June 25, 1789...

, 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...

 that empties into Penobscot Bay

Penobscot Bay

Penobscot Bay originates from the mouth of Maine's Penobscot River. There are many islands in this bay, and on them, some of the country's most well-known summer colonies. The bay served as portal for the one time "lumber capital of the world," namely; the city of Bangor...

 near the town of Castine

Castine, Maine

Castine is a town in Hancock County, Maine, United States and was once the capital of Acadia . The population was 1,343 at the 2000 census. Castine is the home of Maine Maritime Academy, a four-year institution that graduates officers and engineers for the United States Merchant Marine and marine...

. From the confluence of Black Brook and the outflow of Walker Pond (44.3544°N 68.6781 °W), the river runs about 14 miles (22.5 km) north, northwest, and southwest, forming the border between Brooksville

Brooksville, Maine

Brooksville is a town in Hancock County, Maine, United States. As of the 2010 census, the town population was 934. It contains the villages of North Brooksville, South Brooksville , West Brooksville, Brooksville Corner, and Harborside .-History:It was first settled by John Wasson, Samuel Wasson and...

 on its left bank and Sedgwick

Sedgwick, Maine

Sedgwick is a town in Hancock County, Maine, United States. The population was 1,102 at the 2000 census. The town includes the village of Sargentville....

, Penobscot

Penobscot, Maine

Penobscot is a town in Hancock County, Maine, United States. The Bagaduce River runs through the town. The population was 1,344 at the 2000 census.-Geography:...

, and Castine on its right.