A BNSF train of high-priority piggy-backs descends around the Tehachapi loop as a similar eastbound train waits below in the siding at Woodford.
A single GE unit guards the rear end of a westbound BNSF manifest as it creeps down Cajon pass's steepest gradient.
The gradient eases for the four leading GE's on a long double-stack train approaching Cajon's Summit, although the pair of rear-end helpers can't rest just yet.
GE and EMD units combine their efforts to bring westbound tonnage over Cajon pass.
A pair from BNSF's huge fleet of DASH-9's push with their considerable might on the rear of a heavy stack train as it grinds uphill through the multiple curves above tunnel 10.
A westbound manifest on the Palmdale line approaches Sullivan's curve as a piggy-back train can be seen working it's way through the pass in the background.
An eastbound Union Pacific stack-train begins to stretch it's legs as it rounds the curve to Summit, while a similar BNSF train behind it is still labouring up the 3% south track.
There still seems to be plenty of traffic running but the economic climate does seem to be having an effect on the length of some trains, as evidenced by this lightly loaded stack train descending... (more)
A pair of GE's make light work of bringing an empty container train up through Silverwood and around the curve towards Summit.
An eleven unit BNSF 'light' power move makes it's way eastwards from Summit down the south track.
A BNSF manifest eases downgrade into tunnel two; it's tourtuous crossing of the Tehachapi mountains almost complete.
With the San Bernadino mountains in the background, a lone GEVO leads an eastbound stack train up Beaumont hill.
Three relatively clean GEVO's head west through Summit with a lengthy stack train.
A lightly loaded manifest crosses onto UP metals for the remainder of it's descent of Cajon pass.
Foreign power lends a hand in bringing a BNSF stack train west over Cajon pass.