The drainage is quite complex. The west is drained by the Canoe River, which starts in the west then makes a big bend just south of Valemount to flow south, joining the Columbia river at the mouth of the Wood River. (Boat Encampment). However the north and east is largely drained by the Fraser River, which flows northwest from here towards Prince George, following a completely different path to the Pacific Ocean from the Columbia. The third major river in the area is the North Thompson. The Canoe River separates the Selwyn Range from the Monashee Mountains.
History: The Selwyn Range was named after Alfred Selwyn (1824-1902). According to both Handbook of the Canadian Rockies, and Placenames of the Canadian Alps, he was the first director of the Geological Survey of Canada. (Editors Note: I thought that was William Logan??)