BNSF 6917 (ES44C4) leads a two car GEO train in south Denver, Colorado.

The California Zephyr backs into Denver's Union Station between the myriad of catenaries that support RTD's commuter rail system.

UP 5889 (AC4400CW-CTE) leads a coal train up to Tunnel #1 at Plainview, Colorado as it heads west on the Moffat Tunnel Sub.

RTD Light Rail Train #323 runs past an idle BNSF heavy train in downtown Denver, Colorado.

The Southwest Chief runs the S curves south of Trinidad, Colorado.

The Southwest Chief makes good time running south of Wagon Mound, New Mexico

The Southwest Chief leaves Wagon Mound, New Mexico behind and splits the semaphore signals at Levy.

The Southwest Chief runs towards Raton, New Mexico as it heads south from Trinidad, Colorado.

The BNSF engine servicing facility in Denver, Colorado is active on this day. A cut of engines is moving into the yard as another pair are moving from the yard to the servicing facility for sand ... (more)

The California Zephyr runs through the trees at Tolland, Colorado as it heads to the Moffat Tunnel.

Amtrak engine 171 (P42DC) leads the California Zephyr with no ditch lights through Keenesburg, Colorado.

CAGX 1134 (SW1200) gets ready to move a cut of hoppers from the grain facility in Commerce City, Colorado.

Cargill Grain's 1134 (SW1200) works the yard at the Commerce City Grain elevator north of Denver, Colorado.

It won't be long before the last semaphore signals are removed from Levy and Wagon Mound, New Mexico. These sentinels of the Southwest Chief are being replaced for conventional signal poles.

One of these is not like the others..... While the BNSF is busy repainting their older units in the Heritage III paint scheme (the 'Swoosh') there is one veteran still wearing its paint from 1974... (more)