The Moffat Tunnel Sub is about to get busy as two UP trains stage for a run into the Colorado Rocky Mountains.

A group of Union Pacific heavies get ready to lash up to a long oil can train which will soon get the green to head west on the Moffat Tunnel Sub.

UP 8212 (ES44AC) runs alongside two oil can trains, one of which it will lash up to prior to heading west on the Moffat Tunnel Sub.

UP 8212 (ES44AC) leads a power move under the signal tower at Denver, Colorado, where it will lash up to a waiting oil can train on the Moffat Tunnel Sub.

Six Union Pacific motors move through the UP's North Yard and to a waiting oil can train positioned to head west on the Moffat Tunnel Sub.

UP 8212, 6275, 7185, & 4254 westbound with a manifest.

Pusher lends a hand to Eastbound coal.

Pusher unit on NS 734 passes signal at Shell Mound.