Here are the links I promised:

(this is where we used to pick up old rr spikes and sell them to the tourists for fifty cents a piece)
Alpine Tunnel lots of pictures;

Alpine Tunnel Historic Dist. Auto Tour description;

Alpine Tunnel scroll down for the pix;

and, this one is not to be missed if you ever get a chance to ride it. Sadly, right now, it has been stopped lest any sparks from the tender cause more forest fires since they run in Durango and over the top to Silverton: Durango to Silverton Narrow Gauge 120 years running!

And, one I've been on several time and which Amtrak still runs:

1949 brochure describing the new California Zephyr and its Vista Dome cars;

California Zephry History.

When I get my pix unpacked, I'll try to get some up of coming across the Rockies on the Zephyr. It is really dramatic and beautiful.