This is a eastbound stacker, heading slightly downgrade towards its next stop and recrewing at Needles.
BNSFs Z LACKCK's entire train can be seen in this photo, a mile or so east of Klinefelter on the Needles Sub.
BNSF 4663 shoves the KCKBAR into the dessert.
A clean ES44DC leads a stack train downhill towards Needles, CA.
BNSF 5162 leads a manifest down the hill into Needles for a crew change.