I like the last one best, a crop as Stamper suggested might make it more balanced… but the first photo is also pleasant. The second one doesn't say "Rockies" to me.
Number two and three for me. I have never been to the Rockies but any image I have seen from there generally has a lot of contrast which number one lacks. You may have decided - I don't know - for the "flat" look but most observers would expect the contrasted version. A few months ago I suggested on the forum that it is possible to post two versions of an image. In this case the original and a contrasty one. I got flak for that idea because the original is the author's vision. yet members all the time suggest that another version is "better" In this case I would like to see the contrasty version. I don't believe in downloading and doing it myself so it is up to Justin to decide. BTW the train image I like very much but with a crop on the right hand side?
The second one was taken on the trip but as you so rightly point out isn't in the Rockies. It was a very intense early morning light and I was happy to capture it. It's at Sylvan Lake and is a private holiday village there.