The Westbound California Zephyr departs Truckee, CA.

Two rafts float down the Colorado River giving the occupants a good view of Amtrak’s westbound California Zephyr between Tunnels 39 and 40 in scenic Little Gore Canyon west of Azure, Colorado, o... (more)

Amtrak’s westbound California Zephyr cruises through the snow at Crescent, Colorado, on December 22, 2006.

Dropping down Donner Pass at the famed Yuba Gap, passengers aboard the Westbound California Zephyr must be enjoying the views of freshly fallen snow...

Amtrak 192 leads the westbound California Zephyr through Hinsdale.

Running approximately 4 hours behind the mark, Amtrak's Zephyr 5 heads west along the Truckee River with a broken down P42 and a UP ACe in the lead.

AMTK 200 rockets out of Chicago Union Station.

Snow falls as the westbound California Zephyr rounds the curves at Glenshire.

Amtrak’s westbound California Zephyr climbs the front range of the Rockies as it leaves Rocky, Colorado, and heads toward Big 10 Curve on August 11, 2015.

The westbound California Zephyr rolls out of Truckee in the first snowstorm of the season.

The westbound California Zephyr starts its climb up the Rocky Mountains as a dense patch of fog begins to lift along the foothills.

After a long day of sightseeing at Arches Nation Park. I slipped out to catch the evening Amtrak number 5 just East of Green River.

Westbound California Zephyr flies through Western Springs.

Amtrak's California Zephyr continues its journey west along the Colorado River after departing Glenwood Springs, CO on October 3, 2015.

The California Zephyr speeds through the western Chicago suburb of Downers Grove starting its journey west from Union Station to Emeryville.