BNSF 7008 (ES44C4) muscles a loaded coal train past some rock formations at Palmer Lake, Colorado.

A pair of colorful BNSF motors move past a former Burlington Northern caboose as they head towards the yard in Longmont, Colorado.

Amtrak 73 (P42DC) leads the California Zephyr as it climbs up to Tunnel #1 at Plainview, Colorado.

BNSF 7042 (ES44C4) leads a freight through Spruce, Colorado on the Joint Line. It will next pass through Palmer Lake and Monument on its way to Colorado Springs.

Commuter train RTD 4028 (Eagle P3) runs along an elevated section of the 'G Line' to Arvada, passing a frozen pond in the Union Pacific's North Yard in Denver, Colorado.

A night of heavy snow does not stop the crew of BNSF 1592 (SD40-2) from getting an early morning start on building a train in the small yard in Golden, Colorado.

The California Zephyr emerges from Tunnel #1 after a snow storm the night before and freezing fog coated the foothills in snow and ice.

Amidst low clouds and light snow, the California Zephyr #6 rounds the corner at Crescent, Colorado. It will take another hour an a half to get to Denver's Union Station, but I doubt the riders w... (more)

The snow that has blanketed CBQ 5629 (4-8-4) shows the streamlined nose to good effect. She was built in 1940 at the Burlington shops in Iowa and was one of 15 engines of its class designed for f... (more)

BNSF 6970 (ES44C4) has solo duty as it highballs an auto rack train on the northbound track through Castle Rock, Colorado.

A fresh looking BNSF 3686 (ET44C4) holds station on the Broomfield Siding with a stack train as the crew waits for a green signal to proceed to Denver.

An amazing sunrise greeted the riders of the light rail train headed by RTD 238. The train was getting ready to pull into the Lone Tree City Center Station on the 'R' Line.

The California Zephyr exits Tunnel 29 and rounds the corner heading to Pinecliffe, Colorado.

Looking more like something out of a Tim Burton movie of a spider ready to catch a train, here we see the California Zephyr arriving at the Rocky siding at dusk, its light shining through some tre... (more)

BNSF 7147 (ES44C4) leads a blade train through 'The Sag' just north of Palmer Lake, Colorado.