The south side of Boundary Bald Mountain drains via Churchill Stream, Upper Churchill Stream, and Heald Stream (east to west) into the Moose River, then into the Kennebec River, and into the Gulf of Maine.
The south side of Boundary Bald Mountain drains via Churchill Stream, Upper Churchill Stream, and Heald Stream (east to west) into the Moose River, then into the Kennebec River, and into the Gulf of Maine.