The southeast side of Mount Angeles drains into Morse Creek, thence into the Strait of Juan de Fuca a couple of miles east of Port Angeles.
The northeast side of Mount Angeles drains into Ennis Creek, thence into Port Angeles Harbor.
The north and west sides of Mount Angeles drain into the South Branch of Little River, thence into the Elwha River and into Juan deFuca in the Lower Elwha Indian Reservation, a few miles west of Port Angeles.