I took the Canadian Pacific train east from Vancouver to Regina—I flew the rest of the way home to NY from there—in 1975. Had a coach seat, because I couldn't afford anything more. I did have a Canadian Pacific credit card back then, which confused everyone (an American with a CP credit card? Huh?) because I originally got it when I used to often take trips to Toronto, and stayed a lot at the Royal York Hotel.
Here's a photo I took when the train stopped in the mountains, en route: