Rear engine helper Santa Fe 3406 helps a westbound down the 3% grade south track at Cajon Summit while a very dirty looking Santa Fe 5712 roars past with an eastbound intermodal hotshot.

Southern Pacific 9177 leads Milwaukee Road SD40-2s MILW 156, MILW 174 and MILW 168 through Sullivan's Curve on Cajon Pass.

UP's Roseville to West Colton freight passes through Davis Ranch on the Palmdale Cutoff.

Southern Pacific 4449 and Union Pacific 8444 race each other up Cajon Pass at tunnel #1. We could see SP 4449 coming through the cut and were surprised when UP 8444 came out of the tunnel at the s... (more)

BNSF 6701 leads its eastbound train through Sullivan's Curve.

BNSF 7857 west enters Sullivan's Curve as it decends Cajon Pass.

7771 leads eastbound autoracks through Sullivan's curve in the early morning.

UP 7525 leads a unit ribbon rail train south on the Palmdale Cutoff.

UP's QRVWC heads south on the Palmdale Cutoff as BNSF 7910 works through Sullivan's Curve.

UP's Los Angeles to Denver intermodal rounds Sullivan's Curve as it works east up Cajon Pass.

A 17 minute exposure of Cajon Pass seen from Sullivan's Curve shows an eastbound BNSF stack train heading up the pass.

A westbound UP manifest is dwarfed by the huge rock formations at Sullivan's Curve in Cajon Pass.

A westbound UP manifest is dwarfed by the huge rock formations at Sullivan's Curve in Cajon Pass. This train is on the UP Palmdale Cutoff

A BNSF freight works uphill around Sullivan's Curve in Cajon Pass

A westbound intermodal train is slowly winding its way down the 3.3 percent grade on the original Santa Fe mainline through Cajon Pass