53
Age of Robert Mondavi when he founded the Robert Mondavi Winery in Oakville in the Napa Valley. Many other Napa pioneers were also in (non-crisis) midlife when they began their wineries–Mike Grgich (Grgich Hills) was 54; John Shafer (Shafer Vineyards) was 48; Warren Winiarski (Stags Leap Wine Cellars) was 42; and Jack Davies (Schramsberg) was 41.