UP 712 (GP38-2) waits for a run to the sand and fuel island in the North Yard in Denver, Colorado.

Light power dominates the Union Pacific's North Yard in Denver, Colorado. In years past these tracks were full of power and it was not uncommon to see 50 or more engines.

UP and BNSF yard jobs work simultaneously in Denver.

The Union Pacific uses a number of GP38-2's in the North Yard in Denver, Colorado.

UP 712 was built in 1980 for the Missouri Pacific and is one of the many GP38-2's that can be found working the Union Pacific's North Yard in Denver, Colorado.

A recently rebuilt UP 712 (GP38-2) shuffles cars in the UP's North Yard in Denver while other light power wait for the call to action.

Not long after we touched down in Denver, I found my way over the UP's North Yard (the former DRGW), where a crew was switching with ex MP GP38-2 #712. I apparently missed RailPictures.net contri... (more)

The Union Pacific local, lead by UP 712 (GP38-2), passes over the twin bridges in lower downtown Denver on its way to Littleton, Colorado.

The snow is falling at a heavy rate as the two yard crew try to finish sorting a cut of freight cars in the North Yard with UP 712 (GP38-2).

There's a few visiting strangers in the UP's North Yard in Denver.

A dynamic sunrise begins to break over the UP's North Yard in Denver.

UP 712 (former Missouri Pacific GP38-2) works the sorting ladder in the North Yard. The amount of lumber cars passing through the yard is notable - likely responding to the need for building mate... (more)

UP 712 (GP38-2) works the North Yard while UP 6384 and mates wait for an assembled train.

The UP has assembled a string of 8 engines in the North Yard, presumably to relocate the power while moving a stick of freight cars somewhere across the country. Meanwhile, UP 712 (ex Missouri Pa... (more)

A pair of Geeps (UP 712 is a GP38-2 and HLCX is a 50-year old GP38-2 rebuilt from a GP40) work the North Yard as a pair of BNSF units move into the trailer transfer yard.