The Boundary Country is a historical designation for a district in southern British Columbia lying, as its name suggests, along the boundary between Canada and the United States. It lies to the east of the southern Okanagan Valley and to the west of the West Kootenay. It is often included in descriptions of both of those regions but historically has been considered a separate region. Originally inclusive of the South Okanagan towns of Osoyoos and Oliver, today the term continues in use to refer to
the valleys of the Kettle, West Kettle, and Granby Rivers and of Boundary and Rock Creeks and that of Christina Lake and of their various tributaries, all draining the south slope of the Monashee Mountains The term Boundary District as well as the term Boundary Country can both refer to the local mining division of the British Columbia Ministry of Mines, Energy and Petroleum Resources.