The five acre Arrow&Branch Estate Vineyard is tucked into an area northeast of the City of Napa, on a slice of hallowed land known as Tulocay, which is part of the new American Viticultural Area (AVA) of Coombsville. Tulocay refers to the Native American villagers who once inhabited this small valley. Today, the horseshoe-shaped valley of Tulocay describes a viticultural zone, distinct from its neighbors in Napa County in a number of important ways. Like Carneros, its neighbor to the south, Tulocay benefits from the cooling breezes drawn in through the Golden Gate. It is in Tulocay, however, that the morning fog burns off much sooner, and cool breezes sweep through the vineyard on late summer afternoons, slowing the ripening and encouraging flavor and character development in the grapes. This microclimate, combined with its Coombs Gravelly Loam soils, is quite distinct from both the valley floor and mountain appellations of the Napa Valley.