Fifteen miles inland from the Pacific coast at Pismo Beach, above Lopez Lake, in a bucolic upland valley where cows graze and peacocks run wild, Bill Greenough tends eight acres of zinfandel vines. Three of these were planted more than a century ago, around 1880, by the original homesteaders on the site. The vine tops were dead when Greenough bought the property in 1974, and the land was overgrown with chaparral and poison oak. Working laboriously, vine by vine, he restored the vineyard. Then he planted five additional acres of zinfandel, some with cuttings from his heritage vines. The eight acres give him just enough grapes, in a good year, to make 2,000 cases of his acclaimed Saucelito Canyon zinfandel.