Amtrak's eastbound Zephyr moving through the Rockies heading for Denver

An eastbound Union Pacific coal train eases into the S curves just east of Kremmling on its way to Denver from the coal loadouts of Colorado.

The eastbound California Zephyr rolls out of the setting sun at Kremmling, CO.

A fog bank hangs in the sky above Kremmling as a eastbound coal train passes the Kremmling signal. The train was loaded on the Craig Branch.

Amtrak train 5, the westbound California Zephyr, passes through a short tunnel in Gore Canyon outside of Kremmling, CO on November 9, 2017.

With a westbound train in the siding, Rio Grande Train 138 rolls east through Kremmling, Colorado on the Moffat line. The Union Pacific SD40-2 between the two Rio Grande units will become commonpl... (more)

A westbound manifest freight train rolls through Gore Canyon near Kremmling, CO on February 13, 2016.

The Rio Grande Zephyr train No. 17 rolls through incredible Gore Canyon west of Kremmling, Colorado on April 14, 1979.

Gliding across the Rockies near Kremmling, Amtrak's westbound California Zephyr follows the route of the former Rio Grande toward Salt Lake City at an impressive track speed of 60MPH.

On a frigid January morning in the Rocky Mountains, Amtrak's westbound California Zephyr cruises through rural snow covered Colorado, backlit by the morning sun.

On its westward trek across the Rocky Mountains, Amtrak No. 5, the California Zephyr catches the morning sun near Kremmling on the former Rio Grande Moffat Tunnel route.

A UP coal load assults the 1% grade up Gore Canyon. The Moffat Road ran a survey around this chasm up and over the Gore Range on a long and twisting 2%, the route thru the canyon was more expensiv... (more)

The head end of a train full of empty coal hoppers bound for the Craig Branch pokes out of Tunnel 39 as the tail end continues the journey around the curves of the valley floor.

Amtrak 5 speeds across the flats near Kremmling into the afternoon sun. In just a few miles the scenery will change dramatically as the California Zephyr enters the dramatic Gore Canyon, with its ... (more)

The westbound Amtrak California Zephyr zips westbound through the outskirts of Kremmling between the scenic Byers and Gore Canyons.