- I had hard drive troubles for two weeks before the trip, so I don't have a pretty layout here yet. It should still be navigable. June 13th, in which I fly to Seattle, then drive to the Grand Coulee Dam. June 14th, from the Grand Coulee Dam through Idaho to Glacier National Park. June 15th, a rainy drive through Glacier, then south and east to Bozeman. June 16th, with a little more rain, a ...www.thom.org/road/northwest