Tigisfat's "where am I"?

[tigisfat]

This locale should be familiar to simulator fans. Where am I and what is the significance? Where else have you seen this area? I apologize, these aren't the best shots because the scenery texture quality is low and I didn't compose them well, but they get the idea across as to where I am.

For extra points, can you name each location?

[tigisfat]

No one? This is the Marias Pass in Montana, and most American's favorite route in Microsoft Train Simulator. At the top is the turn into the main West grade. Next is nearing the top of the West Grade. The third shows the Essex yard and Wye. The last is the summit balloon track.