Denver & Rio Grande Western GP-30 number 3006 on display in the Forney Museum of Transportation near downtown Denver.

The California Zephyr is led by Amtrak #160 "Pepsi" as it heads towards Tunnel #17 in South Draw, Colorado.

Amtrak #160 "Pepsi" heritage scheme (P42DC) leads the California Zephyr through South Draw on the Moffat Tunnel Sub.

Amtrak engine #60 (P42DC) in the "Pepsi" paint scheme back the California Zephyr into Denver Union Station.

Amtrak #160 (P42DC) in the "Pepsi" paint scheme arrives in Denver, Colorado with the California Zephyr.

BNSF 2585 (GP39-3) sits in the Denver Yard as the California Zephyr rolls by.

RTD commuter train #4128 (Hyundai Eagle P3) takes the elevated track over the California Zephyr, which is arriving at the Denver Yard prior to backing into Denver Union Station.

BNSF 3014 (GP40-2) sits in the engine serving yard along with a GP39 and the red caboose and white cars of the BNSF fire train.

UP 1957 (SD40N) works the North Yard in Denver, Colorado.

Here is a good look at DODX 39497, the Department of Defense's nuke cask heavyweight flatcar designed to carry spent nuclear fuel rods. It stopped by the yard in Denver for a few days.

Amtrak engine #71 (P42DC) leads the California Zephyr into downtown Denver, Colorado.

UP 737 (GP38-2) heads into the North Yard, passing a bay window caboose which is on the active roster and used as a shoving platform on trips to nearby businesses.

UP 1837 (SD40N) shows signs that it might have spent some time in California before arriving in Denver.

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.