Washington State was effectively a 'dry-state' producing only grape jelly, until the 1980s spawned a wine industry desperate to make-up for the lost time. In 2004 plantings were at 12,141ha (up 4,000ha since 2000). Columbia Valley AVA dominates with approx. 60% of total vineyard area; the prized sub-region Yakima Valley AVA covers 39%; Walla Walla Valley AVA 1%.
Lying to the east and in the shelter of the coastal Cascade Mountains, the region enjoys a dry, distinctively continental climate, where Cabernet Sauvignon and Merlot blends can reach great heights on the sandy gravely loam soils; Semillon and Riesling are the most promising white wines.
In 2005 there were approx 350 wineries (a 10% increase year on year), with the Andrew Will Winery regarded as the region's best.