RTD of Denver commuter train #4002 (Hynda Eagle P3) spits the catenary structures as it runs between Denver and Arvada, Colorado.

Fresh snow on the tracks and sub-freezing temperatures creates the perfect conditions for sunrise whippage as the Winter Park Express Ski Train leaves Denver for the ski slopes in the Rocky Mounta... (more)

Amtrak engine #170 (P42DC) leads the Winter Park Express Ski Train through the signal bridge at sunrise in the North Yard in Denver, Colorado.

UP 1826 (SD40N) works the ladders in the North Yard in Denver, Colorado.

UP 7388 (ES44AC) leads an oil can train west on the Moffat Tunnel Sub out of Denver, Colorado.

UP 7762 (AC45CCTE) joins other heavy units at the servicing island in the North Yard in Denver, Colorado.

RTD of Denver commuter train #4002 (Hyundai Eagle P3) runs between Denver and Arvada.

BNSF 2854 (former AT&SF Bluebonnet GP39-2) works the BNSF Denver Yard shuffling cars into the ladders.

BNSF 1746 (SD40-2) runs over the South Platte River in downtown Denver as it leaves the Denver Yard with a cut of cars.

BNSF 8586 (SD70ACe) and mate wait in the Denver Yard for a loaded coal to pass and will lash on the back as helper units for the run over the Palmer Divide south of Greenland, Colorado.

UP 2762 (ES44AC) has just led the Grand Junction train into the North Yard in Denver, Colorado. The power will soon separate and head to the servicing island for sand and fuel.

A gaggle of light power sits in the North Yard in Denver, Colorado.

Amtrak engine #45 (P42DC) runs through the signal tower in Denver at sunrise as it heads west on the Moffat Tunnel Sub.

Union Pacific Big Boy engine #4014 leaves Denver under a heavy blizzard of snow and an impressive amount of steam.

BNSF 6286 (ES44AC) runs under the Park Avenue Viaduct in Denver, Colorado as it heads to the Denver Yard and a waiting train.