The St. Mary River (sometimes represented as the St. Mary's River) is a river in the East Kootenay region of British Columbia.

It rises in the Purcell Mountains and flows in a generally southeasterly direction to its confluence with the Kootenay River at Fort Steele, British Columbia.

[1]

This article related to a river in the Interior of British Columbia, Canada is a stub.

You can help Wikipedia by expanding it.