Richard, just inside the British Columbia border from Alberta, Canada in the Rocky Mountains. Stunning area!! Lots of neet history to read up on. The rail goes underground to get through this pass.
If you ever get a chance to visit, do it!!
A couple links to check out.
https://en.wikipedia.org/wiki/Rogers...itish_Columbia)
https://www.youtube.com/watch?v=f3VOc8qcrao