An 'old school' Geep in Burlington Northern Cascade Green paint heads to the yard in Denver, Colorado.

BNSF 1600 (SD40-2) strains to pull a sting of cars out of the yard in Denver, Colorado.

BNSF 9325 (SD70ACe) joins a string of other heavies in the yard at the engine servicing facility in downtown Denver, Colorado.

BNSF 5246 (Dash9) takes a train out of the yard in Golden, Colorado and will head to Denver.

BNSF 2708 (GP39-2) sits in the yard in Golden, Colorado, ready to take a train to Denver.

The California Zephyr backs into Union Station located in downtown Denver, Colorado.

Norfolk Southern #4130 (AC44C6M) leads a freight west on the Brush Sub past the Riverside Cemetary in Denver, Colorado.

The California Zephyr tries to outrun thunderstorms as it heads east on the Moffat Tunnel Sub through Crescent, Colorado.

BNSF 5689 (AC4400CW) leads a 9-motor oil can train through Tolland, Colorado as it heads west on the Moffat Tunnel Sub.

A power-heavy BNSF train with 9 motors runs through the North Yard as it heads west on the Moffat Tunnel Sub.

Denver Rock Island Railroad's #1083 (SW1500) crosses a street in Denver, Colorado.

Denver Rock Island Railroad's SW1500 runs a gondola through the Stockyards area in Denver, Colorado.

CN 3321 (AC44C6M) pulls alongside a BNSF ACe in Hillrose, Colorado.

Amtrak engine #157 (P42DC) runs through the BNSF yard in Denver, Colorado, after which it will back into Denver's Union Station.

This gloss black veteran was built in 1953 as a GP7, and was rebuilt into a GP10, working now for the Chattahoochee Locomotive company.