UP 5571 (AC4400CW-CTE) heads west on the Moffat Tunnel Sub with a long freight.

A Union Pacific freight leaves the North Yard on Track 1 and will soon be running through the tunnels on the Moffat Tunnel Sub.

UP 5571 (AC4400CW-CTE) leads a six-headed train out of the North Yard in Denver, Colorado, and heads west on the Moffat Tunnel Sub towards the Colorado Rocky Mountains.

UP 5571 leads an early afternoon Z train up Tehachapi Pass.

As two BNSF coal trains cross Logan Hill, Wyoming, with sunset approaching on June 18, 2015, Union Pacific light engines follow the BNSF load on Track 1. On the other side of Antelope Creek Valley... (more)

Locomotives gather on the fuel tracks at Union Pacific’s former Rio Grande North Yard at Denver, Colorado, on December 22, 2012. The yard tower is visible above the locomotive on the right.

As an eastbound (southbound) Union Pacific coal train lumbers over the summit of Logan Hill on Track 1, a UP light engine move westbound cruises by on Track 2, while over on Track 4, an eastbound ... (more)

UP 5571 with a couple NS mates is accelerating out of California Jct., IA enroute North Platte.

Westbound grain train enters Tunnel 36 on its way to Roseville.

Tough day for the crew of 5571. 1st a stop in Truckee for a problem with an MU unit, and then 2 broken knuckles in Tunnel 41. Only the 4 lead units were out of the tunnel when this was shot, the 4... (more)

UP 5571 head engine of this west bound coal train waits under a moon lit sky for it's second meet of the morning at Erie before proceeding further west.