The Los Carneros AVA spans the last, low hills of the Mayacamas Mountains dividing both Napa and Sonoma Valleys just north of San Pablo Bay. The larger portion of the AVA stretches into Sonoma County with grapes grown here also being allowed to use the Sonoma Valley AVA designation. The area's close proximity to the Bay has made it an ideal location for Pinot noir and Chardonnay production with producers from international Champagne houses such as Moët et Chandon (Domaine Chandon California), Taittinger (Domaine Carneros), and Cava producers planting vineyards or sourcing grapes from the area.