Columbia Valley
The Columbia Valley AVA is Washington State's largest wine region, spanning across eastern Washington and extending slightly into Oregon, covering over 11 million acres. The region features a semi-arid desert climate with hot days and cool nights, along with well-draining sandy-loam soils, creating ideal conditions for viticulture with minimal disease pressure. Prominent grape varieties include Cabernet Sauvignon, Merlot, Syrah, Chardonnay, and Riesling, with the region known for producing structured red wines with bright fruit characteristics and vibrant white wines with notable acidity.