UP 8995 (SD70AH) muscles a mega coal train down through Tolland, Colorado on the Moffat Tunnel Sub.

The snow is falling at such a heavy rate that UP 8051 (ES44AC) has to use its pilot to plow the snow off the tracks.

UP 8051 (ES44AC) exits the east portal of the Moffat Tunnel into a heavy snowstorm that is blanketing the valley in nearly two feet of snow.

The snow is so deep that UP 8051 (ES44AC) pushes a wall of snow ahead of the train as it heads to Denver, Colorado on the Moffat Tunnel Sub.

UP 8051 (ES44AC) has emerged from the Moffat Tunnel into a heavy snow storm and will slowly lead an oil can train towards Denver, Colorado.

The pilot of UP 8051 (ES44AC) pushes the heavy snow off the rails as it leads an oil can train through Tolland, Colorado.

Heavy snow is falling at the east portal of the Moffat Tunnel as UP 8051 (ES44AC) splits the signals while running east on the Moffat Tunnel Sub towards Tolland, Colorado.

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

UP 9050 SD70AH runs past a frozen Boulder Creek as it heads east through Tolland, Colorado 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 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) leads an oil can through heavy snow at Tolland, Colorado as it runs towards Denver on the Moffat Tunnel Sub.

UP 9003 (SD70AH) leads a long oil can train down the valley into Tolland, Colorado after exiting the Moffat Tunnel east portal.