Union Pacific’s Alhambra Sub makes a pair of S-curves – think of a graphed bell curve – to get to West Colton Yard as they pass under the UP’s Mojave Sub just east of the yard. Getting back on (generally) tangent track is UP train MLFWC-06 (Laughlin TX to West Colton CA) behind a pair of faded units (ES44AC 8156 and AC4400CW 5679) and a nice and clean SD70ACe, 8890. Of course, the clean unit is trailing! (Colton, California – April 9, 2021)