The north and west sides of the mountain drain into Ruisseau Clearwater, then into the Rivière Arnold, and the Rivière aux Araignées, into Lac Mégantic, then into the Chaudière River, and Saint Lawrence River, which drains into the Gulf of St. Lawrence.
The northern and western slopes of the mountain empty into Ruisseau Clearwater, which flows into Rivière Arnold, then into Rivière aux Araignées, ultimately emptying into Lac Mégantic, followed by the Chaudière River and Saint Lawrence River, which discharge into the Gulf of St. Lawrence.