Today in history, April 3, 1917, the town of Castaic, took a significant step forward with the opening of Castaic’s first post office inside Sam Parson’s general store.  The establishment of this postal service provided a vital link for Castaic residents, ranchers, and travelers who previously had to journey long distances to send and receive ... The post Today In SCV History: April 3, 1917 – Castaic’s First Post Office Opens appeared first on KHTS Radio. ...read more read less