BNSF Ace 8774 runs through the North Yard on the way to the Moffat Tunnel Sub.

Amtrak engine 84 (P42DC) sits under the lights at Denver's Union Station after bringing passengers back home from the Winter Park ski resort. The popular Winter Park Express has sold out this yea... (more)

The platforms at the fuel track in Union Pacific’s locomotive facility at North Yard in Denver, Colorado, are a slushy mess on April 15, 2013. Two workers discuss tasks, the weather, the railroa... (more)

An assortment of engines sits at BNSF's 38th St Yard engine shop.

BNSF 1984 and rebuilt GP39-3 2621 sit in BNSF's 38th Street Yard

Heavy snow has frosted BNSF 8460 (SD70ACe) as it brings an empty coal train into the Denver Yard.

UP 5806 (AC4400CWCTE) moves out of the servicing area of the North Yard and will head to a train that needs some extra muscle.

UP 1507 (ex Southern Pacific GP40M built in 1969) joins other light power in the Union Pacific's North Yard in Denver, Colorado.

When it’s snowing this hard, you better hang on during switching moves, as this hostler does at Union Pacific’s North Yard fuel track in Denver, Colorado, on April 15, 2013.

As fast as you can sweep or dig them out, the switches at Union Pacific’s North Yard fuel track will have filled back in during the next move. This storm dumped nearly a foot of snow in Denver, ... (more)

RTD commuter train 4022 takes to the elevated track as a Canadian Pacific DPU pushes a freight into the Denver Yard.

Fresh snow has frosted a line of engines at the BNSF engine servicing facility in Denver, Colorado.

UP 7701 (AC45CCTE) threads the needle running past the Union Pacific's North Yard and the BNSF's Intermodal facility in Denver, Colorado with a loaded coal train.

Telltale storm clouds break at dawn to reveal BNSF 5952 (ES44AC) and other engines covered in snow at the engine facility in Denver, Colorado.

Locomotives still have to be serviced, even when the weather is bad. A worker on the fuel tracks at Union Pacific locomotive facility at North Yard in Denver, Colorado, heads out into the falling ... (more)