Above: Aging barrels at Eisele Vineyard in Calistoga, California

The Napa Valley contains just over 400 wineries in a narrow corridor 30 miles long by only a couple of miles wide. Their grapes benefit from a magical combination of microclimates and diverse soils. Having taken the advice of the Hideaway Report wine concierge, we selected four premium boutique wineries to visit. There, guided by friendly staff, we were able to discover the subtleties of each vintage and unlock the mysteries of their terroirs.

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