The Dos Rios AVA is an American Viticultural Area located in northern Mendocino County, California. The appellation is located near the confluence of the Eel River and the Middle Fork of the Eel River. The name of the appellation is Spanish for "two rivers". The location would have a warm climate if not for constant breezes from the Pacific Ocean. The soil in Dos Rios is more infertile than other regions in the county.