Sumas Mountain

Sumas Mountain rises in British Columbia’s eastern Fraser Lowland on the south bank of the Fraser River between Abbotsford and Chilliwack, and is widely seen as the point dividing the Fraser Valley’s upper and lower sections. Its prominence is shaped by surrounding prairies and floodplains, including the former Sumas Lake basin to the south. The mountain’s name comes from Halq̓eméylem, meaning “a big level opening,” and earlier forms included Smess and Shemotch. Settlement and industry developed on its slopes through homesteading, farming, logging, mining, and brick clay extraction linked to Clayburn. Today it remains a natural boundary, environmental shield, and defining feature of the central Fraser Valley.

British Columbia · Canada