UP 6657 (AC4400CW) runs through heavy snow on the Moffat Tunnel Sub as it heads towards Rollinsville, Colorado.

A spring storm is dropping a foot of wet snow on the Moffat Tunnel Sub as UP 6657 (AC4400CW) runs through Rollinsville, Colorado.

Heavy snow from a spring storm is falling on the Moffat Tunnel Sub as UP 6657 (AC4400CW) runs through Tolland, Colorado.

UP 8935 & 6713 westbound with a manifest.

UP 7046, 3793, & 6227 lead a westbound mixed freight.

UP 6455 & 7642 power a westbound intermodal train.

UP 6283, 7451, & 6239 westbound with empties running on main two.

The hottest train on the system in these parts. The Denver to Salt Lake Z train. Unfortunately 6916 isn't a DD40X on the UP roster. But it does have quite the history, and as one point was almost ... (more)

Wet, heavy snow from a spring storm is falling on the Moffat Tunnel Sub as UP 6657 (AC4400CW) runs towards Pinecliffe, Colorado while leading a loaded coal train for Denver.

UP 6657 (AC4400CW) runs past South Boulder Creek as it heads towards Rollinsville, Colorado in heavy snow on the Moffat Tunnel Sub.

A winged UP 6657 (AC4400CW) leads a loaded coal train in heavy snow through the signals at Rollinsville, Colorado as it heads down the mountain towards Denver.

A Union Pacific officer's special gets the green to enter the east portal of the Moffat Tunnel at Tolland, Colorado.

UP 4533 (SD70M) leads an officer's special towards the Moffat Tunnel, passing the trusty designated chase vehicle dubbed "The F-Unit".

In the last light of the day a UP Coke train heads north on the CN Missabe sub at Fairlane bound for Thunder Bay, ON.

UP 8530 (SD70ACe) leads a quartet of power out of Tunnel #1 at Plainview, Colorado and will drop down into Coal Creek Canyon.