Address: 1160 Oak Knoll Ave, Napa CA 94558
About Us / Trefethen Family Vineyards History: Our passion extends beyond the wines themselves to the place we live and work. Our family is strongly committed to being good stewards of the land, responsible neighbors and enlightened employers. To make great wine, you have to have great grapes. We firmly believe that the only way to do this is by keeping our vineyards healthy and thriving, which is why we practice sustainable farming.