A Big Boy hauls a string of reefers over Sherman Hill.

There's plenty of smoke coming from this Big Boy as he leaves Cheyenne and makes a run for the hill.

Here a Big Boy hauls a freight on the new, longer but less steep grade known as the Harriman Cutoff. This new line allows some trains to run without helpers.

Here a Big Blow runs up the steeper grade of Sherman Hill.

A Big Boy heads east past Dale Junction over Sherman Hill. It's about this point the climb starts downhill.

An A-B-B-A set of GP9's pulls a train over Sherman Hill. Photo by Jack A Pfeifer.

An A-B-B set of F units climb the new line over Sherman Hill. Photo by Jack A Pfeifer.

UP Big Boy fulls a string of reefers over Sherman hill.

UP Big Blow turbine 29 just came off Sherman Hill and is coming into Cheyenne with two GP35's trailing in the consist.

UP's Big Blow as the name they were known for, runs up Dale junction on Sherman Hill with a freight in tow. Number 23 here is just ten months old. Photo by Richard R. Kindig.

In 1963 EMD fielded a four-unit set of demonstrators – two of the new 2,500-hp GP35s bracketing a pair of its 5,000-hp twin-diesel DD35s. UP, which had already committed itself to the cabless DD... (more)

Peak summer travel season has begun, and Union Pacific’s combined City of Los Angeles-San Francisco is running in two sections, one to accommodate first-class travelers and a second for the coac... (more)

The eastern sky blows up in vivid color just before sunrise in Cheyenne, Wyoming with the UP below and the BNSF going over on October 25, 2015.

A Big Boy heads toward Hermosa on Sherman Hill with a long train. The train is running on the Harriman cut off which is now the number three track. This is the locomotive that is now on display at... (more)

Framed by the firebox door opening, a crew member of Union Pacific’s steam shop is grinding in the firebox of 4-8-4 No. 844. On this date of March 25, 2013, the famous locomotive was getting som... (more)