UP 7045 (C44ACM) leads a freight through Platteville, Colorado as it heads south on the Greeley Sub.

UP 7045 (C44ACM) leads a train through a very frosted Rocky, Colorado.

Light snow is falling as UP 7045 (C44ACM) brings a coal train towards Denver, Colorado on the Moffat Tunnel Sub.

UP 7045 (C44ACM) runs through a snowy Coal Creek Canyon as it heads to Denver on the Moffat Tunnel Sub.

A winter wonderland of frost and snow greet the crew of UP 7045 as the freight heads through Crescent, Colorado.

Sub-Zero temperatures combined with freezing fog and snow created an amazing sight along the Colorado Front Range and the Moffat Tunnel line. Here UP 7045 (C44ACM) runs past a winter scene at Che... (more)

A deep freeze along the Front Range and in the Colorado Rockies gave the crew of UP 7045 (C44ACM) an amazing show of winter. From the east portal of the Moffat Tunnel to the lower elevations of C... (more)

UP 7045 (C44ACM) leads the train from Grand Junction around the bend at Crescent, Colorado on its way to Denver. Conditions all along the Moffat Tunnel Sub were challenging due to negative temper... (more)

Crescent, Colorado received a thick coating of frost and snow on trees and shrubs, providing a winter backdrop against the Armour Yellow of the Union Pacific freight train.

UP's MWCLI departs West Colton seen from Pepper Ave with fresh rebuild 7045.

Brand new rebuild 7045 shoves on the rear of the MWCLI as it works up Beaumont Hill in the late afternoon.