Location

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O'Brien Estate is located at 1200 Orchard Avenue, Napa, CA.  We are south of Yountville, 1/2 mile west of Highway 29.  The easiest way to find us is to turn west off Highway 29 at Oak Knoll, which is just north of the city of Napa.  Cross the railroad tracks and then turn left on Solano.  Orchard Avenue is the first right. We are 1/2 mile down on the right side.
 
Our estate vineyards are located in the Oak Knoll area of southern Napa Valley. The climate here is ideal for Cabernet, Chardonnay and Merlot grapes with fog burning off early, and the cooling influence of San Pablo Bay helping to moderate daytime peak temperatures. The result is that natural acidity and the more delicate nuances of varietal character are consistently preserved.
 
Our soils are comprised of the Dry Creek alluvial fan that has been drawn out of an ancient creek bed running north to south from just south of Oakville to the Napa River. It is the largest alluvial fan in the Napa Valley. Because of the varied bedrock types drained by the fan, the base soil is of the Hare clay loam type under laid with gravel, sand, silt, organic matter and a subsoil of clay. Relatively shallow (24") this prime soil composition is rich in nutrients and produces a fruitier, more elegant wine..

Our soil composition is very similar to Chateau Cheval Blanc of Pomerol. There are over 30 different soil types in the Napa Valley.

Wine history was made in 1976 at the now famous Paris wine tasting, where French judges, in a blind tasting, were stunned to learn that they had judged two California wines to be superior to the most highly rated French wines. The top-rated white wine was the Chateau Montelena 1973 Chardonnay, made from grapes grown on the Hanna vineyard adjoining our vineyard.