Trefethen Family Vineyards is a winery in Napa Valley. It was established in 1968.
Wikipedia https://en.wikipedia.org/wiki/Trefethen_Vineyards
Official Website http://www.trefethen.com/
Phone +1 866 895 7696
Address 1160 Oak Knoll Avenue, Napa, CA 94558, USA
Coordinates 38°21'21.481" N -122°19'23.318" E
