On the California side of the border, where the vast majority ( 33 sqmi ) of the valley lies, the Antelope Valley is served by the Antelope Valley Fire Protection District (formed 1947) Report of the Mono County Planning Department regarding the Antelope Valley Fire Protection District and the Antelope Valley Water District (formed 1961), Report of the Mono County Planning Department regarding the Antelope Valley Water District and includes the communities of Coleville, Topaz, and Walker.