This American Viticultural Area located in Yolo County, California. Part of the larger Clarksburg AVA, Merritt Island is a 5,000 acres (2,023 ha) island in the Sacramento River Delta. The island is surrounded by Elk Slough, Sutter Slough, and the Sacramento River. The island soil is a very fertile and rich loam. Cool breezes and fog arriving from the nearby San Francisco Bay create a cool maritime climate.

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