And here in the comments you will read once again the problem of USA about railways. Take some popcorn.

Multiply those time estimates by about 20.

Itinerary Anarchy

Why not pop over and see Montana while you're here?

I mean I did think road trips were feasible before looking them up not to get dragged into the idea too early, but even then I didn't think it would be a day. In my mind it was like a week at least.