Rolling west from Willow Springs (near Chicago IL) to Los Angeles, BNSF Priority UPS-LTL Intermodal train Z-WSPLAC9-25 passes through the sandstone formations of the Mormon Rocks area of Cajon Pass following a particularly heavy snow the day before. Five General Electric diesel locomotives are pulling this train: BNSF ES44C4 6872, Dash 9-44CWs 4175, 4321 and 4625, and ES44C4 6737. (Cajon Pass, California – December 27, 2019)