Originally Posted by
Sharpshin
Tks, riding an interstate shoulder would be a new experience for me. heck I would do it lots of places if I could.
Just to clarify, in theory at least I could ride most of the 117 miles from Great Falls to Boulder along the shoulder/access road of I 15?
I expect it would be possible and allowed in MT. In my experience, these roads aren't inherently bad (wide shoulders, high speed traffic, not many exit/entrances), but I wouldn't do them for extended times if other alternatives exist.
However, that wasn't what I was suggesting. There is a ~11 mile section between Helena and Boulder where one either rides a (difficult) part of the GDMBR or one is on I-15. I did that part but otherwise was on smaller roads. I was coming from further north and then via Lincoln and MT 200 via Helena. One could also ride MT200 from Great Falls and then Helena.