Boundary Bald Mountain
The north side of Boundary Bald Mountain drains via Alder Brook , Fish Brook , and Hale Brook ( east to west ) into the South Branch of the Penobscot River , then into the West Branch , the main stem of the Penobscot , and into Penobscot Bay . 
<triplet> South Branch <subj> West Branch <obj> mouth of the watercourse <triplet> Penobscot River <subj> West Branch <obj> tributary <triplet> West Branch <subj> South Branch <obj> tributary <subj> Penobscot River <obj> mouth of the watercourse