BNSF 8390 (ES44C4) leads a freight though Keenesburg, Colorado as an orange sunrise glints off the side.

Amtrak engine #39 (P42DC) leads the California Zephyr through the Denver Yard as gets ready to back into Denver's Union Station.

BNSF 9299 (SD70ACe) muscles a coal train on the Brush Sub as it runs through Hudson, Colorado.

BNSF 6713 leads an oil can train through Chemical, Colorado and towards Denver, passing many of the wild sunflowers that have grown along the Moffat Tunnel Sub track.

The large rock formation that gives Castle Rock, Colorado its name, looms in the background as BNSF 8390 (ES44C4) leads a loaded coal train south on the Joint Line at sunset.

BNSF 8390 (ES44C4) runs through Roggen, Colorado as dawn begins to break on the Horizon.

A train of tank cars led by UP 5402 has passed Hot Sulphur Springs, CO and is now heading for Granby on its way to Denver.

UP's MGJNY eases up to the signal at 'Troublesome' to meet the CMSEY. Both trains quickly realized that they were both too long for the meet and after a lengthy conversation with the dispatcher th... (more)

BNSF 8512 (SD70ACe) leads an empty coal train east on the Brush Sub through Tonville, Colorado.

BNSF 9242 (SD70ACe) leads a loaded coal train towards Denver on the Brush Sub.

BNSF 1958 (SD40-2) leads the Hudson Local east on the Brush Sub through Brighton, Colorado.

UP 7741 (ES44AC) leads the Grand Junction train through Rainbow Cut at Plainview, Colorado. Notice what appears to be a burned off shield decal on the nose.

UP 1652 (SD40-2) joins other light power waiting for servicing or orders in the North Yard in Denver, Colorado.

Canadian Pacific #8111 (AC4400CWM) shoves a loaded coal west on the Brush Sub through Tonville, Colorado on its way to Denver.

Denver RTD commuter train #4026 (Hyundai Eagle P3) leaves Denver and heads towards Arvada, Colorado.