Wine grapes, particularly Cabernet Sauvignon, are the true diamonds of this remarkable AVA. Covering 5,000 rocky acres in the Mayacamas Range on the northeast side of Napa Valley, this region has just over 500 acres under vine. Due to the up-valley location and the high elevation of vineyards, the fog that influences the valley floor is not a factor here. Unique, porous volcanic soils and extended exposure to the sun are the reasons that world-class wines are made here. The Cabernets are described as rich and powerful with chewy textures and diamond-hard tannins. Other varieties, including Cabernet Franc and Zinfandel, are being grown with great success. The quality of wines made in this AVA assure a future that is certain to glitter!