Our vineyard, with its stony, volcanic terroir, sits atop Atlas Peakat an elevation between 1,270 to 1,350 feet and is located at the edge of a steep canyon which overlooksthe town of Oakville. The site, which was purchased and planted in 1999by the Michael Mondavi Familyis predominantlycomprised of Cabernet Sauvignon from the Clone Four variety grafted on 110R Rootstock.
In 2006, Michael Mondavi Family Estate acquired Sauvignon Blanc vine cuttings and propagated a new planting from Oakville’s ToKalon vineyard, known as the oldest surviving Sauvignon Blanc in North America. These cuttings trace their lineage directly to Château d’Yquem, arriving in California in the 1880’s through Charles Wetmore. When the new vineyard was established, Michael Mondavi Family Estate selected the same rootstock and trellising used in the 19th century to further preserve the historical method of grape growing and the remarkable living history of the plant’s genetic origins.
The genesis of great wines is great vineyards. Our Oso Vineyard, located between Sugarloaf Mountain and Howell Mountain in the great Napa Valley, is a truly special labor of love. In 2004, our family planted this spot with cuttings from one of the best known root stocks of Sauvignon Blanc with origins tracing to the esteemed Château d'Yquemand which first made its way to California via Charles Wetmore, renowned wine pioneer of the 1880s. Ten years after planting and using the same trellising methods from the 19th century, we made our first vintage of Sauvignon Blanc. Since then, our Heritage Block has delivered beautiful Sauvignon Blanc, vintage after vintage.