Making Kimberly/Cranbrrok about as far north as I'd want to drive from the US. Spokane seems the obvious place to start and end the "Highway" with a decent International airport.
Not skied Kimberly in years. How consistant is the snow? Worth the drive?
Lets add Whitefish. But not Bozeman becasue it is just too damn far East to drive :)
Good skiing south of I 90 but again a long ways to drive if Spokane is the center transportation point.
So you get Mt Spokane, Schweitzer, 49, Silver and Lookout all in one short hop in one direction or another from Spokane. Push it west 150 miles and you get Mission Ridge. .
If you are in Seattle, Mt Baker, Stevens, Alpental and Crystal....But they aren't THE POWDER Highway. And 300+/- miles from Spokane's better/drier snow belt.
What is your dream loop/area given 5 days of FREE lift tickets and the best snow ever.
Seattle, Spokane or Whitefish as the base.
I am seeing multiple 5 day trips here but what is your trip?