You are really close to interior BC and alberta (well close is relative, Bc is huge) The upper elk looks awesome, full on V EGCREEKIN: The Elk River "a leap of faids"
Also the Kootenai runs year round for a big water IV with a waterfall. Also the Idaho Panhandle has some fun looking runs (boulder creek is the one that comes to the top of my head but there are others). check out this map for ideas, you are pretty close to idaho. http://whitewatermap.com/
some of these look pretty solid
Also, if nothing else, you are 3-4 hours from the lochsa...