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 mountain's northern and western sides direct water flow into Ruisseau Clearwater, which merges with Rivière Arnold, then joins Rivière aux Araignées, emptying into Lac Mégantic before flowing on to the Chaudière River and Saint Lawrence River, ultimately discharging into the Gulf of St. Lawrence.