The Barolo DOCG zone is located 7 miles southwest of Alba. In 1896, the Italian Ministry of Agriculture demarcated the Barolo production zone to include the municipalities of Barolo, La Morra, Castiglione Falletto, Serralunga d’Alba and the northern half of Monforte d’Alba.
In 1909, Grinzane Cavour and parts of Novello and Verduno were added to the zone. The final change to the demarcation was in 1966 when parts of Cherasco, Diano d’Alba, and Roddi were included in the production zone which was promoted to DOCG status in 1980.
Despite the addition of territory over the years, more than 87% of Barolo is produced in the original five municipalities of Barolo, La Morra, Castiglione Falletto, Serralunga d’Alba and Monforte d’Alba with Barolo and Castiglione Falletto considered the heart of the zone. In addition to restrictions on yield and alcohol levels, in order to be labeled DOCG, a Barolo must have at least two years aging in oak and at least one year aging in the bottle prior to release. For wines labeled Barolo Riserva, five years of total aging is required with at least three of those years in oak.