One of the five winegrowing regions in California
(also Southern Area). The wine-less region is between the two cities of Los Angeles in the north and San Diego on the Mexican border in the south. It covers the subtropical counties south of the Tehachapi Mountains. There is the region-wide AVA South Coast
for wines from grapes from several counties. The counties with their AVA areas are Los Angeles County
(with the only vineyard defined as Malibu-Newton Canyon); Riverside County
( Cucamonga Valley
, Temecula); San Bernardino County
(Cucamonga Valley) and San Diego County
(Ramona Valley, San Pasqual Valley).