 More than half a million lakes, including 30 with an area greater than , and 4,500 rivers pour their torrents into the Atlantic Ocean, through the Gulf of Saint Lawrence and the Arctic Ocean, by James, Hudson, and Ungava bays.The largest inland body of water is the Caniapiscau Reservoir, created in the realization of the James Bay Project to produce hydroelectric power.Lake Mistassini is the largest natural lake in Quebec.