Kootenai

geographical name

Koo·​te·​nai ˈkü-tə-ˌnā 

-tə-nē

variants or in Canada Kootenay

river 407 miles (655 kilometers) long in southwestern Canada and northwestern U.S.; rises in British Columbia, flows south into Montana, west and north through Idaho, and back into British Columbia, where it goes through Kootenay Lake (65 miles, or 104 kilometers, long) into the Columbia River