BNSF 1675 (SD40-2) moves through the BNSF yard in Hudson, Colorado.

The sunrise is casting a golden glow over the California Zephyr as it runs west on the Brush Sub towards Keenesburg, Colorado.

BNSF 7365 (ES44DC) leads the Z Train east on the Brush Sub towards Hudson, Colorado.

BNSF 9294 (SD70ACe) muscles a loaded coal train west on the Brush Sub towards Keenesburg, Colorado.

A long BNSF autorack train runs through the open lands between Greenland, Colorado and Palmer Lake while southbound on the Joint Line.

Hudson Terminal Railroad's Alco S1 passes a pair of BNSF motors waiting to take a cut of oil cans from the terminal to Denver, Colorado.

Hudson Terminal Railroad's 79 year old Alco S1 moves a cut of sand hoppers through the yard in Hudson, Colorado.

BNSF 8494 (SD70ACe) waits with two problem coal cars on the side track at Spruce, Colorado. The ACe if needed, would help trains get over the Palmer Divide.

BNSF 8225 (ES44C4) leads the Z Train into a bright sunrise as it heads east on the Brush Sub at Crest, Colorado.

BNSF 6823 (ES44AC) leads a train over a stone arch bridge in Spruce, Colorado as it heads south on the Joint Line.

The California Zephyr passengers and crew are treated to an amazing Colorado sunrise as the train passes through Keenesburg on the Brush Sub.

Hudson Terminal Railroad's #646 will turn 80 years old this year, having been built in 1946 for the Detroit & Mackinac Railroad. You can find it working the oil can terminal in Hudson, Colorado. ... (more)

The 79 year-old Alco S1 of the Hudson Terminal Railroad (built in 1946 for the Detroit & Mackinac Railroad) passes a pair of vintage heavy weight passenger cars as it moves through the yard.

BNSF 6341 (ES44AC) crosses Highway 72 in Coal Creek Canyon as it heads to Denver on the Moffat Tunnel Sub.

BNSF 6244 (ES44AC) muscles a freight into Coal Creek Canyon on the Moffat Tunnel Sub.