BNSF 4775 leads a Z-Train south into Marcel on the Morning of January 29th, 2011.

On a warm spring morning, an eastbound intermodal twists its way upgrade through the curves at Cliff high above Tehachapi Creek.

Four GEs lead a lengthy Z-train through the verdant rolling hills of the Tehachapi Mountains, as the train climbs southbound through Bealville.

As the hills turn from green to brown signaling the end of springtime in the Tehachapis, a BNSF z-train works its way through the curves at the north end of Bealville.

A lengthy z-train works up the mainline through Bealville, as a northbound Union Pacific manifest slows on the siding for the meet.

Early morning light fills the Tehachapi Creek Canyon, as four C44-9Ws lead the Z-STOWSP out of Tunnel 7 high above the creek bottom below.

The first snowfall of the year for the Tehachapi Pass blankets the ground, as BNSF's Z-STOWSP works upgrade between Cable and Tehachapi.

Eight units are on the point of this z-train as it climbs through Cable, several miles below the summit at Tehachapi.