UP 8016 (ES44AC) leads a train through the snow and fog at Tolland, Colorado as it heads to Denver on the Moffat Tunnel Sub.

Heavy snow is falling outside of the Moffat Tunnel East Portal while deep inside a Union Pacific freight train is slowly making its way through the 6.2-mile-long tunnel.

UP 8016 (ES44AC) runs through Crescent, Colorado as heavy snow falls on the Moffat Tunnel Sub.

UP 8016 (ES44AC) runs between Tolland and Rollinsville after coming through the Moffat Tunnel and into heavy snow.

UP 8016 (ES44AC) splits the signals after exiting the east portal of the Moffat Tunnel and runs into heavy snow falling on the east side of the Continental Divide.

Heavy snow is falling at Tolland, Colorado as UP 8016 (ES44AC) leads an oil can on the Moffat Tunnel Sub.

UP 8016 (ES44AC) runs through a sunny Leyden, Colorado as it heads to Denver on the Moffat Tunnel Sub.

It is snowing heavily on Christmas Eve as UP 8016 (ES44AC) leads an oil can train down the hill from Tunnel #1 at Plainview, Colorado.

UP 8016 (ES44AC) leads an oil can through heavy snow at Tolland, Colorado as it runs towards Denver on the Moffat Tunnel Sub.

Heavy snow is falling at the east portal of the Moffat Tunnel on Christmas Eve as UP 8016 (ES44AC) exits leading an oil can train destined for Denver, Colorado.

I was able to catch this grain train on the Provo Sub after getting out of work. The old D&RGW main.

Shortly after a maintenance window in the area lifted, a westbound loaded ethanol train drifts downgrade through Echo, past its iconic rock outcrop. As this train approached the crossing - which i... (more)

A Fresno, CA to West Colton, CA manifest snakes it's way up to Tehachapi at Marcel.

Power for MWCFW (West Colton-Ft. Worth) pulls out and prepares to tack onto its train at West Colton.

2 units lead this short Fresno to West Colton train at MP 377. If you look closely in the background, you'll see UP has installed new signals and the famous signal bridge's days are almost over...