The largest operational diesel-electric locomotive in the world, UP 6936, soaks up some sunlight at IRM.

UP 6936 & 6930 team up with a freight extra at the Illinois Railway Museum.

A special visitor from the Union Pacific fits in perfectly with the DD40X #6930 and GTEL #X-18 at the Illinois Railway Museum. Big thanks to the UP for sending the 6936 to the museums 60th Anniver... (more)

Union Pacific Centennial within the Union Pacific Steam Shop at Cheyenne.

Union Pacific's LAX heads up Cajon Pass on its way east. The power for this hot UPS train is the typical "Fast Forty Sandwich" (two DDA40X "Centennials" back to back, with an 8000-class SD40-2H b... (more)

Union Pacific Centennial within the Union Pacific Steam Shop at Cheyenne.

Centennial No. 6905 leads a hot eastbound pig train at Martinez Spur.

Merger mania in Utah's Price Canyon: A trio of Southern Pacific AC4400CWs lead a stopped IPP train at Utah Railway Junction while a Union Pacific officer's special rolls by on the main, headed eas... (more)

At sunrise, a westbound UP pig train with back-to-back Centennials for power winds its way down No. 3 Track, which has a grade of 3.0 percent.

UP Centennial No. 6927 leans into the curve at Martinez Spur as it leads an eastbound manifest up Cajon's eastern slope.

for reasons that I do not remember, Union Pacifics hot LAZ is detouring over Santa Fe and has just been pulled backwards out of UP's East Los Angeles yard down the San Pedro Sub and is now heading... (more)

Union Pacific 6904 is the first in a long line of stored locomotives at Yermo Yard. The dry climate made for an excellent place to store locomotives. Photograph taken with permission.

A Union Pacific passenger special, run to commemorate the Idaho Statehood Centennial, zips east along the Salt Lake Sub at the Glovers Lane overpass in Farmington. The nine car train will be route... (more)

One of Union Pacific's iconic Centennials awaits minor repairs at North Yard prior to a return to service on the mainline. UP 6902's tenure would be short lived as it was retired from the active r... (more)

The unmistakable profile of a Union Pacific DDA40X glides through North Yard by the powerhouse in Salt Lake City. The 6923 was built by EMD for the UP in Dec. 1969, and would be traded back to EMD... (more)