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

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".

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

A Union Pacific Officer Special gets ready to leave the North Yard in Denver, Colorado and will run into the Colorado Rockies for the Moffat Tunnel.

A Union Pacific Officer Special runs towards the evening sun as it gets ready to enter the Moffat Tunnel at Tolland, Colorado.

A westbound I train lead by UP 5762 passes through San Timoteo Canyon as it heads down Beaumont Hill.

UPY 1403 and UPY 1296, a pair of MP15DCs, sit at the port in Granite City. They will eventually be repainted in UP themed colors and renumbered at PHRR 1403 and 1296. The other unit is a GP40 al... (more)

UP 3095 brings up the rear of an eastbound manifest at El Casco.

The UP only runs a pair of trains over the trackage rights agreement they have with BNSF. These trains run in and out of G4 and operate over the BNSF Transcon towards KC. Usually, the westbound is... (more)

UPY GP15-1 733 leads a local East through Duluth, heading to Rice's Point Yard.

Wrap Around Photo. Union Pacific Railroad 2528 (ES44AC-H/C45AH) leads a robust six-pack of power through Coal Creek Canyon approaching Blue Mountain Drive in Aravada, Colorado on July 28, 2... (more)