SOUTHERN CALIFORNIA REGION | This area in California is located further south than the Central Coast AVA. Loosely defined, the Southern California Region includes seven AVAs that cover 270,000 acres in Los Angeles, Riverside, San Bernardino and San Diego counties. The Southern California Region extends from Malibu, north of the city of Los Angeles to the southern border of California below the city of San Diego. Among the seven AVAs located in the region, the South Coast is the largest with an area totaling 115,200 acres. Cucamonga Valley contains 109,400 acres of land. Ramona Valley has 89,000 acres. Temecula comprises about 33,000 acres, San Pasqual Valley around 9,000 acres, Saddle Rock-Malibu about 2,100 acres and Malibu-Newton Canyon, 850 acres. The region has about 44 wineries.