Company Overview. . Trefethen Family Vineyards is a family-owned estate vineyard and winery in the Oak Knoll District of Napa Valley. For over fifty years, we have been crafting distinguished estate grown wines that express the unique spirit of our land, vines, and people. Our core values include family, respect, sustainability, authenticity, learning and joy. With loyal customers around the country and the world, and a dedicated team of employee...
