BNSF 9155 (SD70ACe) runs past Barr Lake as the setting sun casts a glow on the motors and empty coal cars.

BNSF 6254 (ES44AC) waits for a green in order to muscle a loaded coal train through Brush, Colorado.

BNSF 4251 (ES44C4) runs west on the Brush Sub out of Hudson, Colorado as it heads to Denver.

BNSF 4251 (ES44C4) runs west out of Fort Morgan as it heads to Denver on the Brush Sub.

Canadian National 3321 (AC44C6M) runs towards a siding at Hillrose, Colorado.

Canadian National #3321 (AC44C6M) is tied down at Hillrose, Colorado as it waits for a relief crew to run to Denver.

BNSF 4251 (ES44C4) kicks up the dust as it leads a fast-moving Z Train west on the Brush Sub through Roggen, Colorado.

BNSF 4251 (ES44C4) leads a Z Train west on the Brush Sub through Hudson, Colorado.

The California Zephyr #6 train reflects off of Barr Lake as it runs west on the Brush Sub through Brighton, Colorado.

Great Western Railway's #2176 (0-4-0T Tank Engine) was built in 1930 and worked the sugar beet refinery in Loveland, Colorado before finding its home in front of the former Fort Morgan Power Plant... (more)

BNSF 8125 (ES44C4) leads a power heavy manifest train towards Akron, Colorado on the Brush Sub.

BNSF 7105 (ES44C4) leads the priority Z Train into a cut just east of Akron, Colorado on the Brush Sub.

Amtrak engine #51 (P42DC) leads the California Zephyr #6 train past Barr Lake as sunset.

The California Zephyr runs through Akron, Colorado at sunrise as it heads towards Denver on the Brush Sub.

BNSF MAC 9716 gets ready to squeeze past a trailer as it runs towards the depot in Longmont, Colorado.