New technology and America's discovery of wine led to the innovation and enthusiasm inspiring Sonoma today. About 100,000 tons of grapes are now produced annually on 30,000 vineyards for 125 wineries, half of which are less than 15 years old. Napa had better be looking over its shoulder. It runs parallel to the Napa Valley, which lies immediately to its east with the Mayacamus Mountains serving as the boundary line. The Alexander Valley, historically part of the Russian River Valley, is an old and well-respected agricultural area with a reliably warm climate.
Yields tend to be high.
Summer fog which regularly creeps into the valley contributes to complexity. Chardonnay is often blended with fruit from cooler regions. Dry Creek can yield Chardonnay and Sauvignon Blanc on the foggy fertile valley floor, but the red soils and warmer climate make Dry Creek's slopes Zinfandel heaven. Ridge's Lytton Springs Vineyard is here, as are Dry Creek Vineyards, Nalle, Quivira and others including Gallo. Sonoma Valley enjoys cooling breezes and fogs from San Pablo Bay to the south and fogs from Santa Rosa in the north.