A frosty-chinned BNSF 5700 (ES44AC) leads a freight through Arvada, Colorado on the Moffat Tunnel Sub.

BNSF 2828 (GP39-2M) leads a load of lumber off the Broomfield Siding towards Lafeyette, Colorado.

BNSF 2530 (GP39-3) crosses the highway with a load of lumber for a customer in Lafeyette, Colorado.

A crewmember of BNSF 2530 (GP39-3) is walking back after throwing a switch allowing the Buck Local to get on the siding in Broomfield, Colorado.

Darkness falls at Pinecliffe, Colorado as Amtrak's Winter Park Express Ski Train runs through Tunnel #29 on its way back to Denver Union Station.

Amtrak's Winter Park Express Ski Train runs through Tunnel #29 at Pinecliffe, Colorado as heavy snow blankets the Moffat Tunnel Sub.

BNSF 9709 (Executive Grinstein SD70MAC) brings the Coors Beer Train into the Denver.

BNSF 2719 (ex-Burlington Northern GP39-2) and BNSF 1732 (ex-ATSF SD40-2) sit at the engine servicing facility in downtown Denver, Colorado.

BNSF 1733 (SD40-2) pulls a cut of cars out of the Denver Yard for sorting.

BNSF 5700 (ES44AC) leads the Provo train through the Crescent Curve as fresh snow blankets the area.

BNSF 8130 (ES44C4) rounds the corner with a freight at Blue Mountain, Colorado at sunrise.

With Mount Evans looking snow packed, the BNSF Buck Local runs the Front Range Sub towards Broomfield, Colorado,

The Winter Park Express Ski Train crosses Blue Mountain Road in Coal Creek Canyon.

The California Zephyr 5 train runs in the snow through Crescent, Colorado as it heads up to the Moffat Tunnel.

BNSF 2549 (ex ATSF GP39-3) holds on a siding with a cut of oil cans for the refineries in Commerce City, Colorado.