BNSF 5830 (ES44AC) leads oil cans through Coal Creek Canyon on the Moffat Tunnel Sub.

Amtrak engine #207 (P42DC) leads the California Zephyr over the bridge spanning Highway 72 in Coal Creek Canyon.

BNSF 5628 (AC4400CW) runs east on the Brush Sub through Tonville, Colorado.

BNSF 6077 (ES44AC) climbs the 2% grade out of Coal Creek Canyon and towards Tunnel #1 at Plainview, Colorado.

Private dome lounge car Northern Sky (800588) was built in 1955 for the Union Pacific. It is seen here running over the bridge spanning Highway 72 in Coal Creek Canyon on the back of the Californ... (more)

BNSF 5830 (ES44AC) leads a long oil can train through Coal Creek Canyon as it heads to Denver on the Moffat Tunnel Sub.

Amtrak engine #136 (P42DC) leads the California Zephyr through Tunnel #1 and will continue to drop in elevation as it heads to Denver on the Moffat Tunnel Sub.

Amtrak engine 136 (P42DC), with a friendly wave from the engineer, leads the California Zephyr down the hill from Tunnel #1 and into Coal Creek Canyon on the Moffat Tunnel Sub.

The California Zephyr #6 train exits Tunnel #1 and will soon drop into Coal Creek Canyon on its way to Denver, Colorado.

Amtrak engine 136 (P42DC) leads the California Zephyr #6 train down the 2% grade into Coal Creek Canyon as it heads to Denver on the Moffat Tunnel Sub.

UP 6045 (AC4400CW-CTE) leads an officer's special up the 2% grade out of Coal Creek Canyon and towards Tunnel #1.

The California Zephyr is led by Amtrak engine #203 (P42DC) in the special paint scheme of Operation Life Saver as it rounds the corner leading to Tunnel #1 on the Moffat Tunnel Sub.

Amtrak engine #203 (Operation Life Saver P42DC) runs through Coal Creek Canyon as it heads into the Colorado Rocky Mountains on the Moffat Tunnel Sub.

The California Zephyr #6 train drops down from Tunnel #1 and into Coal Creek Canyon.

The California Zephyr 6 train drops down the 2% grade into Coal Creek Canyon, Colorado as it heads to Denver on the Moffat Tunnel Sub. Denver's skyline is visible in the upper part of the photo. ... (more)