Pairs of Great Wines, No. 5: The Grade & Sea-Fog

Tom Thornton is an architect and Brenda Mixson works in commercial real estate finance, but like so many other people who have successful careers, they wanted to own a vineyard and make wine. They acquired a 32-acre ranch in Napa Valley's northern Calistoga district in 1997, and within that spread they focus on the 12-acre Winfield Vineyard. They first …