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The Anderson Valley AVA (American Viticultural Area) is located about ten miles (16km) from the Pacific Ocean, 115 miles (185km) north of San Francisco in Mendocino County. This narrow valley is perfectly positioned and shaped to funnel in fog and wind from the Pacific Ocean. Rain is also plentiful, making this one of the coolest regions of California. That said, it should be noted that there is a huge variation in temperatures from one end of the valley to the other.
Acidity stays high in the grapes grown here. Because of the cool, consistent growing season, they are often harvested up to a month later than elsewhere, which packs in the flavors. Anderson Valley is a beautiful area without the bustle of some other wine regions, so it is an enjoyable place to visit.
Mostly cool climate varieties are grown in the north-western end of the valley, where proximity to the Pacific Ocean lowers the temperature. Sparkling wines produced here are of exceptional quality, prompting the French Champagne house Louis Roederer to set up a local winery, Roederer Estate. Anderson Valley's Pinot Noir has a sweet, uncomplicated style all of its own and Chardonnay does especially well. Excellent examples of Riesling and Gewurztraminer are also produced, leading to the establishment of an annual International Alsace Varietals Festival.
The south-east of the valley is up to 10 degrees warmer than further north, allowing a different range of grape varieties to be grown, including Cabernet Sauvignon, Merlot and Zinfandel. Some of the Zinfandel vines are more than 100 years old and are still producing outstanding concentrated wines. Even though this part of the valley is warmer, the cooling effects of fog and wind are still very evident in the finished wines, and more light to medium-bodied styles are generally produced.
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