 The third largest AVA, the area is responsible for more than 40% of the state's entire wine production.Located within the larger Columbia Valley AVA, the Yakima Valley AVA is further sub-divided into the smaller Red Mountain, Snipes Mountain and Rattlesnake Hills AVAs Of the region's , nearly were planted as of 2008.Within the larger AVA are vineyards planted in some of the coolest regions in Eastern Washington including Boushey Vineyard.