BNSF 1579 (SD40-2) and mate run light into the refinery district in Commerce City, Colorado.

BNSF 1579 (SD40-2) runs light with a mate as it heads to a refinery in Commerce City, Colorado.

BNSF 1733 (SD40-2) leads a cut of oil cans past the refineries in Commerce City, Colorado.

BNSF 7117 (ES44C4) runs on the BNSF Brush Sub track and gets ready to cross the diamond and the Union Pacific Greeley Sub track as it heads through Commerce City, Colorado on the way to Denver.

BNSF 9020 (SD70ACe) leads a coal train past the Suncor oil refinery in Commerce City, Colorado as the refinery flares extra gas out of a stack.

UP 1957 (SD40N) brings a short cut of cars through the refineries in Commerce City, Colorado.

UP 5802 (AC4400CW-CTE) leads a freight through the refineries at Commerce City, Colorado as it runs to Denver on the Greeley Sub.

A fresh-looking BNSF 1448 (former Burlington Northern Cascade Green SD60M) gets ready to lash up to a cut of tank cars waiting at the refineries in Commerce City, Colorado.

UP 6148 (ES44AC) leads a freight through the refineries in Commerce City, Colorado as it heads to Denver on the Greeley Sub.

UP 845 (GP38-2) works an industrial yard in Commerce City, Colorado.

The last seconds of sunset light catches BNSF 6427 (ES44AC) leading a coal train through the refineries in Commerce City, Colorado.

Union Pacific Big Boy #4014 leaves the Denver skyline behind as it heads towards Commerce City on the way back to home base in Cheyenne, Wyoming.

A bike rider is about to get a touch of steam as the Union Pacific's Big Boy #4014 crosses a bridge in Commerce City, Colorado, home of a number of oil refineries.

UP 688 (GP38-2) works a yard in Commerce City, Colorado, waiting for the signal to grab a cut of gondolas from a nearby scrap metal business.

BNSF 6826 (ES44C4) leads a freight past the refineries in Commerce City, Colorado.