These photos are from my annual spring trip to Tehachapi. March is typically the best month to go because the scenery is the best. This gallery shows the trains in the order that I saw them throughout the day, with emphasis on the progression of specific trains up the hill.
Easbound Automax at the Loop.
Westbound BNSF 4903 at Caliente.
Eastbound BNSF 4776 at Caliente.