2013 Opus One, Napa Valley, California, USA

North Coast's Napa Valley is California's most famous viticultural area (AVA), claiming some of the most expensive agricultural land in the world and producing wines of cult status. Its 16,000 ha of vines lie over a strip (40 miles long-5 miles wide) of diverse soils (clay, gravely, volcanic), with its northernmost end on the side of Mountain Helena and its foot in San Francisco Bay. The valley is framed by two mountains ranges Vaca (to the north) and Mayacamas (to the south), yet the main climatic influence is the cool wind and fog that is sucked in from San Pablo Bay during the afternoon, allowing grapes to ripen slowly and evenly. The area enjoys a variety of unique microclimates, as temperatures can vary dramatically as much as 15 degrees, from the north to the south end of the valley. These differences have led to the creation of several sub-AVAs (14 in total) including: Atlas Peak, Chiles Valley District, Diamond Mountain District, Howell Mountain, Los Carneros, Mt. Veeder, Oakville, Rutherford, St. Helena, Spring Mountain District, Stags Leap District, Yountville, Wild Horse Valley and Oak Knoll District. The Calistoga AVA is still pending approval. Both the Napa Valley designation and the sub-AVA name must appear on the wine label simultaneously, with the exception of wines from the Carneros AVA, which is shared between the Napa Valley and the Sonoma County. Cabernet Sauvignon is the undisputed king of Napa grapes, occupying over 45% of the vineyard acreage, followed by (predominantly) Chardonnay, Sauvignon Blanc, Chenin Blanc, Riesling, Zinfandel, Merlot, Cab. Franc and to a lesser extent Petite Sirah, Sangiovese, Barbera, Dolcetto.

Opus One is among California’s leading wine estates. It was founded as a joint venture between two leading wine producers: Baron Philippe de Rothschild, the owner of Château Mouton Rothschild in Pauillac, Bordeaux; and Robert Mondavi, one of the most influential figures in Californian wine history. The ambitious pair created Opus One in 1978, the first vintage following in 1979. It is located in the Oakville sub-region of California’s Napa Valley. There are four estate-owned vineyards, including considerable holdings in the prestigious To Kalon vineyard.
There are two wines produced at Opus One. Opus One itself is a red Bordeaux blend dominated by Cabernet Sauvignon, along with Merlot, Petit Verdot, Cabernet Franc and Malbec. Like a lot of top Classified Growth Bordeaux, Opus One undergoes ageing in new French oak barrels for around a year and a half. A second wine, Overture, is also produced. Overture is also a red Bordeaux blend. It differs from Opus One in that it is a non-vintage wine, crafted from the fruit of several vintages.