Charles Krug Winery is a private winery and vineyard operated under the guidance of Peter Mondavi Sr. It is the oldest winery in the Napa valley, and its extensive vineyards are located in Howell Mountain, St. Helena, Yountville and Carneros. There is a detailed calendar of events available on the Charles Krug website. Customers can join the Charles Krug Wine Club for a 20% discount on all Charles Krug wines, as well as complimentary tastings for up to 5 guests at each winery visit. Upon completion of its Redwood Cellar, Charles Krug Winery will resume its regular barrel tasting events; customers may contact the winery by phone for up-to-date information regarding the construction.