The Boca DOC, one of the smallest appellations in the Alto Piemonte, encompasses only twelve hectares spread over five villages (Boca, Maggiora, Cavallino, Prato Sesia, Grignasco) and split amongst eleven different vineyard owners. While Nebbiolo is the principal grape, Vespolina and Uva Rara are integral parts of the DOC as well. The soils are composed of limestone, clay and sand, similar in profile to Gattinara, which is a short 10km drive to the southwest.