Trefethen Family Vineyards is a grape-growing and winemaking estate. Its singular passion for good wine has kept the Trefethen family in business for 40 years. Its mission is this: Trefethen wines should taste like Trefethen grapes. The estate is located in the Oak Knoll District, world famous for its enriched soil and mesoclimate. The marine influence of the region produces rich and expressive fruit with warm enough temperatures for Cabernet Sauvignon and cool enough for Chardonnay and Pinot Noir vareities. The family is proud of a heritage of estate-grown grapes as an expression of themselves. Varietals offered are dry Reisling, Chardonnay, Merlot, Cabernet Franc, Cabernet Sauvignon, with the winery's flagship Halo Cabernet Sauvignon. The Trefethen Family Estate was established in 1968.