Trefethen Family Vineyards is a family-owned winery in the Oak Knoll District of Napa Valley, California. The winery has been producing award-winning wines since the late 1960s and is known for its commitment to sustainable farming and winemaking practices. The Trefethen wine collection includes a range of varietals, including Chardonnay, Cabernet Sauvignon, Merlot, Pinot Noir, Riesling, and Malbec.
The winery is also known for producing a Reserve Cabernet Sauvignon, which is made from the best lots of grapes from the estate vineyards. In addition to their traditional wine offerings, Trefethen also produces a sparkling wine and a dessert wine.