Originally Posted by
Steve B.
FWIW, Darren Alf, also known as as the Bike Touring Pro, just did this ride and route, or at least did it this past May I believe, it’s on his current YT series about 600 miles around Montana. He was on the frontage road most of the way, except for that short section on I90 which didn’t seem to be an issue for him. I seem to recall he said it was a noisy route due to I90 traffic nearby.
https://youtu.be/HrVbM28JIII?si=9fDDNgAKVeMJv1A8
I didn’t find it particularly noisy, but maybe because both times I rode it on a Sunday. The one major exception was Sloway Campground east of Superior, Not only is there an I-90 bridge across the Clark Fork, but you have train activity right across the river. I shot the when I stayed there in 2019:
There is private campground on the west end of St. Regis that was quiet. Stayed there in 2017, but it looks like it’s a seasonal RV-only place now.
https://www.campgroundstregisrvpark.com/