Smoke and haze create and eerie glow at sunrise as the California Zephyr runs through Wiggins, Colorado on the Brush Sub.

The California Zephyr passes through Eisele as it heads towards Blue Mountain on its way up the Moffat Tunnel Sub. Note the two private Patrick Henry Productions cars on the end.

The California Zephyr leaves the Denver skyline behind as it takes the Moffat Tunnel Sub towards the Colorado Rocky Mountains.

The California Zephyr is in its 'COVID consist' (no baggage car) as it rounds the corner in the Union Pacific's North Yard and heads to the Moffat Tunnel Sub, which will take it to the Colorado Ro... (more)

An orange sunrise catches the California Zephyr as it runs towards Denver, Colorado.

The California Zephyr #5 passes through Wiggins, Colorado right after sunrise, traveling west on the Brush Sub towards Denver.

The California Zephyr #5 train hits the sun after running through Tunnel 1 at Plainview, Colorado.

The California Zephyr exits Tunnel 1 as it heads into the tunnel district on the Moffat Line. There will be 29 more tunnels to go through before the train is on the western side of the Continenta... (more)

Just east of Rocky, in Barbara's Gulch, the first westbound Zephyr to leave Denver on a Wednesday morning in almost eight months approaches a Clear (green) signal at the east end of Rocky. A lone ... (more)

Amtrak engine #71 leads the California Zephyr up the hill towards Tunnel 1 at Plainview, Colorado.

After running through Little Ten Curve the California Zephyr rounds the base of Big Ten Curve which will elevate the train to the track seen in the background.

After picking up two private Patrick Henry cars at Denver Union Station, the California Zephyr headed west and is seen here navigating Little Ten Curve as it starts its climb into the Colorado Roc... (more)

Amtrak engine 71 (P42DC) leads the California Zephyr through Wiggins, Colorado at sunrise.

The California Zephyr runs along the hills on the Moffat Tunnel Sub west of Rollinsville, Colorado.

The California Zephyr runs past Barr Lake in Brighton, Colorado. On the back if you look closely are two private Patrick Henry cars.