I haven't looked at an aerial shot of the Pocatello switchyard in a while. It seems the place has been almost scraped clean. You can see the outlines of the switches and the circular turntable for moving the locomotives, but it looks very smooth now. Disappointing.
I think everything coming into Cal goes through Barstow and then goes toward LA/SD or north up the valley into Sacramento or the Bay area. Another line takes passenger trains up and down the coast SD to Portland.