Eight miles north of San Pablo Bay, the Bundschu familys 165 year-old Rhinefarm vineyards wrap around the southwest slopes of the Mayacamas Mountains. Two distinct blocks of 50+ year old Chardonnay vines have consistently produced top lots with the greatest complexity. At first light, the vineyard crew begins harvesting by hand cluster by cluster, looking for clones that have a variation of large and small berries to deliver complexity, freshness, and age ability for our Heritage Chardonnay.