Washington's success with vinifera grapes is due in large measure to the state's unique geography. The vineyards are planted on the east side of the Cascade Mountains which serve to protect the region from marine weather off the Pacific coast and limit rainfall to just 6-8 inches annually. Low rainfall and free-draining soils allow vineyard mangers to control vine vigor in order to promote flavor development in the grapes. Warm daytime temperatures ripen fruit to perfection. Cool autumn nights protect grapes' natural acidity.

Appellations:
Columbia Valley
Puget Sound
Walla Walla Valley
Red Mountain
Yakima Valley
Columbia Gorge
Horse Heaven Hills
Wahluke Slope
Rattlesnake Hills