AVA area (also briefly Carneros) in the region North Coast in California, It extends across borders in the two counties Napa and Sonoma extends. The name Carneros is derived from the Spanish word for "ram" and refers to the earlier use of this region as pasture for sheep by Mexican farmers out. Near the city of Sonoma founded the immigrated from Hungary Californian viticulture pioneer Agoston Haraszthy (1812-1869) the historic winery Buena Vista Winery, The vineyards cover about 3,500 hectares of vineyards in a rolling hills with cooling sea breezes from the nearby Pacific. The dominant two grape varieties are Chardonnay and Pinot Noir from which acidified still wines are pressed. The cool climate is perfect for the production of sparkling wines, The wines are also under the parent AVA Napa Valley marketed. Well-known producers with vineyards in this area are Beaulieu Vineyard. Charles Krug Winery. Codorníu. Mondavi and spunk (Mum Napa).