Several years ago my wife and I took an "America By Rail" trip. Rode the Amtrak out of Dearborn, MI to Chicago where the trip started. We went southwest on what they said was the old Santa Fe Trail on to Los Angeles. There we boarded a huge cruise ship and hopped in and out of ports all the way to Vancouver, Canada. We boarded the Amtrak there (the Empire Builder?) and rode back to Chicago. It was a very enjoyable trip. I will say that the roomettes are a joke though. Not designed well to sleep two people.
Dennis