The Penobscot River, including its north, south, east, and west
branches, is the longest river entirely in Maine. Its branches
originate along the Canadian border in northwestern Maine, and
near the headwaters of the Allagash at the northwest corner of
Baxter State Park The East and West Branches converge in Medway,
just downstream from the Town of Millinocket, forming the main
stem of the river which then flows 70 miles south to the head of
tide in Bangor. The watersheds associated with the Penobscot’s
four branches are forested and only sparsely settled and
developed. An exception to this is the rivers themselves, which
have dams in many locations to provide storage that assures
year-round flows for commerce and industry downstream. The
Penobscot’s main stem flows past towns and developments,
especially at its south end from Old Town to Bangor. The variety
of habitats found throughout the Penobscot drainage support many
game fish species, including brook trout, landlocked
salmon,smallmouth bass, white perch