Union Pacific 4-8-4 844 leads a short passenger train around Sullivan's Curve in southern California's Cajon Pass under skies that were threatening rain. The cold temperatures, however, provided more steam than is typically visible. This train, SWCYR 19, is heading from West Colton to Yermo this day, and will continue its journey eastward to Cheyenne over the next few days. (Cajon Pass, California – November 11, 2019)