NS 4130 (AC44C6M) passes markers in the oldest cemetery in Denver, the Riverside Cemetery.

BNSF 1600 (SD40-2) works the yard in Denver, Colorado, sorting cars into the various ladders.

BNSF 6435 (ES44AC) waits for servicing at the facility in downtown Denver, Colorado.

BNSF 5908 (ES44AC) muscles an oil can train through Big Ten Curve at Rocky, Colorado, as it climbs the 2% grade of the Moffat Tunnel Sub.

BNSF 2708 (GP39-2) gets ready to take a freight from Golden, Colorado to Denver.

Rocky Mountaineer's GP40-3 leads the passenger train through Tunnel 14 in South Draw on the Moffat Tunnel Sub.

BNSF 7040 (ES44C4) runs towards a crowded Denver Yard

BNSF 5246 (Dash 9) gets ready to leave the yard in Golden, Colorado.

BNSF 2745 (GP39E) moves away from the engine servicing facility in downtown Denver and heads to the yard where it will sort freight cars.

BNSF 8536 (SD70ACe) gets serviced at the facility in downtown Denver, Colorado.

BNSF 5246 (Dash 9) muscles a cut of cars out of the yard in Golden, Colorado and will head to Denver.

The California Zephyr runs through the canyon between Rollinsville and Tolland, Colorado, heading west on the Moffat Tunnel Sub.

Amtrak engine #18 (P42DC) leads the California Zephyr #6 train past Barr Lake after leaving Denver and traveling east on the Brush Sub.

Storm clouds build overhead as the California Zephyr climbs out of Coal Creek Canyon towards Tunnel #1.

Bicycle riders pass the BNSF yard in Golden, Colorado as BNSF 5246 (Dash 9) gets ready to take a freight to Denver.