UP 4642 departs Tucson Yard as a westbound enters on No. 1 track at m.p. 988.

Having been parked at Stockham all day to due a work curefew to the west, brand-new SD70M idles patiently as a westbound Z train led by a CSX SD70MAC speeds by on the main.

UP 963 West enters Tucson Yard on No. 1 track as an eastbound stack departs.

Horizontal lightning streaks across the sky as Rillito's west signal gives a red indication after an eastbound has passed.

UP ebd rolls through Rillito late on a monsoon afternoon.

UP Z train descends into Tucson on No. 2 track at Kolb Road.

UP stack train 4564 East departs Tucson on No. 1 track as a hot Z train overtakes it on No. 2.

UP 4755 East holds in Rillito siding for a meet with two westbounds.

UP 9801 heads east near Marana with a manifest in tow.

A UP Z train passes 4343 East parked in the siding at Kino.

A pair of UP eastbounds wait on the main for a train at Rillito to start moving toward Tucson after its crew went dead on the law.

A trio of new UP SD70Ms in Stockham siding catch the light of the sky at dusk.

The signal at Rillito's west end stands quietly as lightning crashes over the Tortolita Mountains.

UP 4983 West enters Tucson Yard at sunset under monsoon skies.

A westbound intermodal train waits in the siding at Red Rock at dusk.