Amtrak engine #146 (P42DC) leads the California Zephyr through South Draw, Colorado on the Moffat Tunnel Sub.

BNSF 9301 (SD70ACe) leads a freight through the scenic turns and tunnels of South Draw, Colorado.

The California Zephyr emerges from Tunnel #1 at Plainview, Colorado as it heads into the Colorado Rocky Mountains.

BNSF's Denver, CO to Provo, UT manifest train (UP symbol QPSPVJ 12) slowly approaches the siding of Plainview as it prepares to meet an eastbound Union Pacific coal train.

The California Zephyr exits Tunnel #1 at Plainview as it runs on the Moffat Tunnel sub into the Colorado Rocky Mountains.

The California Zephyr runs through Tunnel #12 in South Draw, Colorado, pulling a private car on its way to Denver's Union Station.

The evening California Zephyr #6 train runs through the tunnels at South Draw, Colorado on the Moffat Tunnel Sub.

A winter wonderland greets BNSF 5973 (ES44AC) as it leads a freight through heavy snow at Crescent, Colorado.

UP 3880 (SD70M) leads the Rocky Mountaineer through Tunnel #14 in South Draw, Colorado.

UP 3880 (SD70M) leads the Rocky Mountaineer towards Tunnel #13 in South Draw, Colorado.

The clouds have parted just as the California Zephyr runs through Tunnel 13 in South Draw, Colorado.

Amtrak engine #15 (P42DC) leads the California Zephyr through the trees in South Draw, Colorado on the Moffat Tunnel Sub.

The Rocky Mountaineer runs through Tunnel #15 in South Draw, Colorado as it heads to Denver on the Moffat Tunnel Sub.

The private dome car Rail Ventures PPCX 800212 (ex-Union Pacific "City of Portland") runs towards Tunnel #13 in South Draw, Colorado on the back of the California Zephyr as it heads to D... (more)

The splendor of South Draw, Colorado under sunny skies are experienced by the passengers and crew of the California Zephyr as it runs through Tunnel 14 and heads towards Tunnel 13 on the Moffat Tu... (more)