A westbound stack train passes the old siding of Sibyl where there is now double track.
Late on a winter afternoon, an eastbound UP stack train blasts up the 1.0 percent at Shawmut as shadows engulf the slopes of the Maricopa Mountains.
UP 6106 West drops downgrade past m.p. 1038 on the western slope of the Dragoon Mountains.
An eastbound UP manifest departs Tucson at dusk.
A westbound coal train off the BNSF in New Mexico plys the UP as it heads for Tucson Electric Power's Irvington Generting Station in Tucson.
UP 8767 West waits for a call from the Tucson yardmaster before proceeding from Irvington, where Tucson Electric has a coal-fired power plant.
An eastbound with loaded ballast hoppers near the head end roars upgrade toward the Vail crossovers as a monsoon storm builds to the east.
The Sunset Limited crosses the Cienega Creek Bridge with the concrete Marsh Station Road bridge in the foreground.
A long eastbound manifest negotiates the big curve at Cienega, where the rear of the train can be seen across the wash as the freight's three tunnel motos come into view.
A stack train behind a patched tunnel motor uses a bridge over the San Pedro River installed in 1995 as part of SP's efforts to double-track this busy portion of the Sunset Route.
A Maxi-Trax equipped GP40 leads a North Line Local out of Tucson Yard as another train arrives from El Paso on the adjacent main track.
A westbound UP stack train crosses the mysterious Willcox Playa behind a venerable ex-SP T-2.
KCSM 4726 West waits for another train to clear so it can proceed on its long journey to the U.S.-Mexico border and beyond.
The head end of an eastbound freight flashes past the target signal at Rillito's west end as a giant saguaro stands guard.
A hot eastbound UP stack train departs Tucson Yard just before sunset after changing crews.