Union Pacific engine 2584 (ET44AC) runs solo as it leads a stack train out of the Hermosa Tunnels in Wyoming.

UP 2584 eastbound with four Amtrak Midwest passenger cars in tow.

Southbound stacks bounds for El Paso and beyond sweep around a curve in great setting sunlight.

UP 2584 leads a monster ZLCBRX up the Palmdale Cutoff at Canyon as it rounds Sullivan's Curve.

2 UP tier4's that have been assigned to a ballast train working on the second main project between Walong and Marcel are found at the bottom end of the Mojave yard.