Westbound stacks decend the grade though San Timoteo Canyon near El Casco.

Another in UP's fleet of trains along the Yuma Sub works upgrade near El Casco.

UP 4102 leads 3 other EMD on the point of a eastbound at El Casco Lake.

One of UP's last ordered SD70ace's for 2011 leads a eastbound up San Timoteo Canyon at El Casco.

UP 8657 eases towards the signals at El Casco and will come to a brief stop due to traffic ahead.

Near the location of the old SP crossovers at El Casco, This eastbound works hard on a cold morning in San Timoteo Canyon.

Leading what would turn out to be a huge parade of Eastbound trains this morning along the Yuma Sub, UP 7405 works through El Casco in early morning light.

UP 7345 heads West through San Timoteo Canyon at El Casco.

Eastbound ZLAMQ grinds through El Casco as it makes its way through San Timoteo Canyon.

Eastbound autos work upgrade as they pass the signals at El Casco.

One of UP's newest SD70ace's leads a Eastbound ZLAMQ through El Casco.

3 EMD's grind through El Casco with a long K-Line stack train as they work up San Timoteo Canyon.

UP 8629 leads the Los Angeles to Mesquite, Texas Z up San Timoteo Canyon at El Casco.

CP 8617 leads its train down San Timoteo Canyon at El Casco.

FXE 4656 leads 2 CSX units on a Houston Texas to Los Angeles stack train seen winding down San Timeteo Canyon.