UP 5580 (C44ACCTE) leads an empty string of flat cars through Larkspur, Colorado.

The Denver Rock Island Railroad's SW8 makes a run towards an industrial area in north Denver, Colorado.

Amtrak engine 69 leads the California Zephyr through Little Ten Curve and will soon enter Big Ten Curve as it gains elevation climbing into the foothills of the Colorado Rocky Mountains.

BNSF 8117 (ES44C4) leads a GEO train through Palmer Lake, Colorado.

A heavy lashup of BNSF power was needed for this long grain train running through Westminster, Colorado

BNSF ACe 9274 leads a loaded coal train on the Joint Line through the Black Forest at Larkspur, Colorado

BNSF ACe 9272 leads a loaded coal train on the Joint Line towards Larkspur, Colorado

BNSF 9276 (SD70ACe) muscles a loaded coal over the Santa Fe Bridge in Larkspur, Colorado.

UPY 577 (GP15-1) is sorting a cut of cars into the ladder of the North Yard in Denver, Colorado.

Amtrak engine 23 (P42DC) leads the California Zephyr #6 train out of Tunnel 29 at Pinecliffe, Colorado during a heavy March snowstorm.

RTD 4011 (Hyundai Eagle P3) makes the early morning run on the RTD Commuter Rail A Line towards Denver International Airport.

Its a full blown Snowmgeddon blizzard as a BNSF crew member is braving the storm, standing between the engines in order to get a group ready to move from the BNSF engine servicing facility to the ... (more)

Its 'Throwback Thursday' as a number of former Burlington Northern units wait for service or assignments in the BNSF's Denver Yard.

Dense fog and freezing sleet is making travel tough for BNSF 5902 (ES44AC) which is leading an intermodal train in 'The Gap' between Castle Rock and Larkspur, Colorado.

Light snow is falling and the sun is peaking through the clouds as BNSF 9274 (SD70ACe) leads a coal through Sedalia, Colorado.