Union Pacific is pretty darn good at PR when it comes to their excursion and heritage fleet. In addition to just the nice list of locomotives they have preserved (and operational), they also enjoy being very selective when it comes to picking units that run on special excursion trains. Case-in-point is this shot. UP 4884 was assigned (along with UP 4010) to the train that is moving UP 4014 (the Big Boy), which is a 4-8-8-4 locomotive, from California to Cheyenne, WY!
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