BNSF 9161 (SD70ACe) leads a freight past a grain train sitting on the siding at Tonville, Colorado.

BNSF 1660 (SD40-2) leads a string of freight cars out of the yard in downtown Denver, Colorado.

Sunrise catches the gloss black PRLX 4102 (SD40-2) moving through the yard in Hudson, Colorado.

Heavy snow falls as BNSF 8549 (SD70ACe) takes the Coors Beer Train out of Golden, Colorado.

Amtrak engine #5 (P42DC) leads the California Zephyr through Keenesburg, Colorado at sunrise.

BNSF 6274 (ES44AC) leads a freight through Broomfield, Colorado as it heads to Denver on the Front Range Sub.

BNSF 5235 (Dash9) leads a stack train towards Palmer Lake, Colorado on the Joint Line.

BNSF 3640 (ET44ACH) shoves a loaded coal through Tonville, Colorado on the Brush Sub.

BNSF 5636 (AC4400CW) approaches a county road crossing in east Keenesburg, Colorado as it heads to Denver on the Brush Sub.

BNSF 7134 (ES44C4) leads a Grinstein and a freight through Tonville, Colorado on the Brush Sub.

A dynamic sunrise catches BNSF 5915 (ES44AC)) running a loaded coal train past a frozen pond at Tonville, Colorado.

BNSF 5636 (AC4400CW) leads into the elevated curve at Keenesburg, Colorado as runs solo lead on a loaded coal train to Denver.

A colorful Colorado Sunrise at Keenesburg bathes BNSF 8543 (SD70ACe) in a red glow as it runs west towards Denver on the Brush Sub.

A fresh-looking BNSF 3640 (ET44ACH) muscles a loaded coal train through the cut in Keenesburg, Colorado.

A colorful sunrise greets the California Zephyr as it runs through Keenesburg, Colorado on the Brush Sub.