Dynamic weather moves in over the mountains at Plainview, Colorado as UP 5624 (AC4400CW-CTE) leads a freight through Rocky on the Moffat Tunnel Sub.

Clouds hang at the mountain tops as UP 5624 (AC4400CW-CTE) runs a freight through Coal Creek Canyon on the Moffat Tunnel Sub.

UP 5624 (AC4400CW-CTE) runs a freight south through Leyden on the Moffat Tunnel Sub.

Eastbound Union Pacific AC4400CW no. 5624 with stacks, meets westbound covered hoppers on the Transcontinental Route at Peru.

The last train to pass under the CNW signal bridge without the new signals in the background

With the Wasatch Range in deep blue shadows, a unit train of KCCX tank cars roll slowly through UP North Yard in Salt Lake City. This train of sulfuric acid will cycle every few days between the K... (more)

5624 creeping out from under the overpass with Mt. Timpanogos in the background.

It's a long way to the Powder River Basin as a UP runthru coal train heads back west through the Allegheny Mountains.