I'm planning a tour this summer of a loop from Spokane to Missoua, taking in the Spokane an North Idaho Centennial Trails, Trail of the Coeur d'Alene and Route of the Hiawatha, and back to Spokane including the Lewis & Clark Route to Lewiston. I'm seeking information regarding traffic, terrain, services, etc. on the following portions of the route:
a. Getting from the North Idaho Centennial Trail to the beginning of the Trail of the Couer d'Alene. Alternatives appear to be US-95 west of the Lake of the Couer d'Alene or Highway 97 east of the lake.
b. Between the east end of the Trail of the Hiawatha and St. Regis, MT., are frontage roads passable for touring bikes with 35 mm tires present or is riding the I-90 shoulder the way to go?
c. Lewiston, ID, to Spokane -- US-195 through Colvax vs. US-95 and Highways 58 and 278 through Potlatch and Plummer.
Thanks for any information and advice.