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,

BNSF 4276 has 31B's train at track speed between Massive and Eldon on the Laggan Sub.

After a quick crew change at the east end of town, 31B-03's train passes the station of Field heading west onto the Mountain Sub.

BNSF ES44C4 4276 leads 31B-03's business train down "The Big Hill" between Cathedral and Field.

BNSF ES44C4 4276 leads a westbound business train across Lake Ohara Road.

BNSF 5609 & 9675 shove on an eastbound loaded coal train destined for Ottumwa Iowa.

After working JBS Swift, BNSF 2691 & 2560 lead the 431 local east to their base in Aurora.

Evidence of busting snow drifts on the Moffat coat the pilot on BNSF 5700 (ES44AC) as it leads a freight towards Denver, Colorado.

BNSF 5700 (ES44AC) leads the Provo to Denver train around the corner at Crescent, Colorado.

A BNSF business train pulls into Field, BC.

A BNSF business train gets set to pull out of the station at Banff, AB under smoky skies.