Located in the Napa Valley, on the famous Silverado Trail, the Wm. Harrison winery is open for tasting in a beautiful, but rustic winery building which was constructed in 1985 using local white limestone and rough-hewn wood. The architecture of the building is Old California, bringing to mind a functional building from the mission era. Intimate and down to earth, this single building houses both the winery and tasting room; when you step inside you can smell the aromas of the winemaking process.