Amtrak engine #174 (P42DC in Phase VII Paint) leads the California Zephyr through downtown Denver and will soon back into Union Station.

BNSF Geeps are at the ready as the California Zephyr passes through the yard in Denver, Colorado.

OmniTRAX's Gray Ghost #4013 (GP40-2LW) waits in the yard in Fort Collins, Colorado.

Amtrak engine #82 (P42DC in the new Phase VII paint) leads the California Zephyr out of the Moffat Tunnel at Winter Park, Colorado.

A coal train waits for its power as UP 6421 (ES44AC) waits for a green signal to head west on the Moffat Tunnel Sub.

BNSF 6190 (ES44AC) leads a loaded coal train through Greenland, Colorado as it heads south on the Joint Line.

UP 6179 (ex-Southern Pacific AC4400CW) leads a power-heavy lash up as it waits for a green signal to head into the Colorado Rocky Mountains on the Moffat Tunnel Sub.

Amtrak's Phase VII heritage #174 (P42DC) backs the California Zephyr 6 train into Denver's Union Station.

There is a lot to see in this picture of the yard at the BNSF Denver engine servicing facility, including an ACe BNSF 8579, two armored cabooses of the Department of Energy, a special container ve... (more)

BNSF 5102 (Dash9) leads a stack train towards Spruce, Colorado on the Joint Line.

BNSF 5697 (AC4400CW) leads a loaded coal train through Littleton, Colorado as it runs southbound on the Joint Line.

BNSF 6190 (ES44AC) runs towards Palmer Lake on the southbound track of the Joint Line.

BNSF 5102 (Dash9) runs through the nearly 180-degree curve in Palmer Lake, Colorado.

BNSF 5102 (Dash9) crosses over one of the original Rio Grande bridges in Monument, Colorado.

In this shot you can see the long stack train winding through Greenland, Colorado, as it run south on the joint line.