16
Number of “nested” AVAs within the Napa Valley. The first was Carneros in 1983; the most recent was Coombsville in 2011. The others are: Oakville, Rutherford, St. Helena, Calistoga, Oak Knoll District, Yountville, Howell Mountain, Diamond Mountain District, Spring Mountain District, Mt. Veeder, Stags Leap District, Atlas Peak, Wild Horse Valley, and Chiles Valley District.