Fabulous information, Valygrl. Thank you so much.

I have created a route map of a Jasper - Missoula ride (direction unclear, at this point): http://www.mapmyride.com/routes/view/190707694

Instead of riding north/south via Whitefish, the above route goes to the east of Glacier NP and then along Going to the Sun rd and then follows Jamawani's route north.

Again, I'd be interested in any comments about this route.