BNSF 9119 (SD70ACe) leads a loaded coal train through Greenland, Colorado.

UP 4199 (SD70M) leads the Rocky Moutaineer passenger train into Tunnel 2 at Plainview Colorado.

UPY 691 (GP15-1) works the Union Pacific's North Yard in Denver, Colorado.

A remote-control engineer catches a ride back to the head end of the Union Pacific's North Yard in Denver, Colorado.

BNSF ACe 9119 runs over the Rio Grande bridge in Monument, Colorado.

The California Zephyr 5 runs through heavy snow in Keenesburg, Colorado

The California Zephyr 5 train runs through a golden Barr Lake in Brighton, Colorado

Tier 4 engine BNSF 3854 leads a stack train through Brighton, Colorado.

BNSF 5068 (Dash9) leads a short GEO train on the southbound track of the Joint Line in Larkspur, Colorado.

BNSF 3854 (ET44C4) leads the morning Z Train with Boeing 737 fuselage up the hill at Hudson, Colorado.

BNSF 2698 (GP39-3) has just dropped off a cut of hopper cars at a silo in Roggen, Colorado and runs light back to Hudson.

UPY 625 (GP15-1) works the Union Pacific's North Yard in Denver, Colorado.

UP 1507 has had an interesting career, starting life for the Baltimore and Ohio in 1969 as a GP40, then moving to the Southern Pacific after being rebuilt as a GP40M-2. You can now find it workin... (more)

The California Zephyr 5 arrives in Keenesburg just as the sun is rising in the east.

BNSF 3854 (ET44C4) leads a Boeing 737 fuselage and a stack train through West Tonville on the Brush Sub.