Kennebago Divide stands within the watershed of the upper Androscoggin River, which drains into Merrymeeting Bay, the estuary of the Kennebec River, and then into the Gulf of Maine.
Kennebago Divide is situated in an area drained by the upper Androscoggin River, which flows into Merrymeeting Bay and then connects to the Kennebec River's estuary, ultimately leading to the Gulf of Maine.