BNSF 6166 (ES44AC) leads an oil can train through Tonville at sunset.

BNSF 9043 (SD70ACe) is part of an interesting lashup at the BNSF engine servicing facility in Denver, Colorado.

BNSF 1798 (SD40-2) joins Geep 2585 as they wait for orders at the BNSF engine facility in Denver, Colorado.

Four Boeing 737 fuselages fly in tight formation towards storm clouds through Hudson, Colorado as they head east on the Brush Sub.

BNSF 1656 (SD40-2) waits at the BNSF engine servicing facility as a Ferromex unit gets a fresh supply of sand and fuel at the island.

BNSF 2549 (GP39-3) waits for a passing stack train before leaving Roggen, Colorado and heading back to Hudson.

BNSF 6166 (ES44AC) leads a power-heavy oil can train through Tonville, Colorado as storms in the background produce a rainbow.

Cumbres & Toltec Scenic Railroad's #495 (a 2-8-2 K-37 class steam engine) sits waiting for its turn to eventually be restored to running condition.

Cumbres & Toltec Scenic Railroad's #19 (GE 44 Ton) sits at the engine house waiting to move some cars.

Hudson Terminal Railroad moves through the yard at Hudson, passing some vintage passenger cars as it heads to a string of oil cans.

The Rocky Mountaineer passenger train crosses Blue Mountain Road as it heads into Coal Creek Canyon, Colorado.

RTD commuter train #4047 (Hyundai Eagle P3) drops down to terra firma as it gets ready to enter Denver Union Station.

RTD commuter train #4029 (Hyundai Eagle P3) runs the high track past the BNSF engine servicing facility in Denver, Colorado.

BNSF 2857 (GP39-2) heads south on the Front Range Sub and will soon arrive in Boulder, Colorado on its way to Lafeyette.

BNSF 2857 (GP39-2) leads the Buck Local out of Longmont, Colorado on the Front Range Sub.