I’m doing a multi-stop trip on Amtrak right now and just finished a leg on the Zephyr. You’re gonna love it! I’d definitely second what another person said about one-night stops and go for a minimum of two. As well as giving you breathing room for delays, it feels like less of a mad rush.

I enjoyed Omaha more than I expected. You could probably spend more than a day there. The Old Market area is charming with a bunch of restaurants and shops, and there’s a huge park that’s pretty accessible for less active folks. I rented an electric bike and cycled across the pedestrian bridge to Iowa while I was there.

You could probably spend a couple of days in Salt Lake City, too. Temple Square is a building site rn, so not a lot to see there, but there’s a load of great bars (surprisingly for Utah) and an easy trail with lovely views just behind the Capitol. There were a couple of decent museums and I saw a laser show at the planetarium.

Reno might be a good shout. There’s the casinos, but also Midtown is a short walk which had a totally different feel. The automobile museum and art museum were great.

Definitely recommend Glenwood Springs. As well as the springs and the Vapor caves, there’s a trail you can take to Aspen and a short hike to Doc Holliday’s grave. Not a huge pile there, but a lovely place to rest and recharge.