This screenshot of local urbanization from the The Disappearing West mapping project shows the Napa Valley from Napa to St. Helena. It is interesting to note the development of the Rector watershed due north of Napa city (the entire watershed is outlined) in comparison to the hillside areas in the rest of the watersheds on each side of the valley. The only other area of comparable vineyard development is the flatland of Wooden Valley in the lower right.
There are clear-cuttings going on all over the watersheds, of course, but they have yet to join up into the massive visible deforestation evident here on the Rector plateau. They will eventually, however, if county policies remain as they are and the plutocrats needing a winery of their own continue to arrive.
Update 6/10/16: the night sky is disappearing along with the West. 80% of Americans can no longer see the Milky Way. We on Soda Canyon are among the 20% whose sky has not become so polluted that the Milky Way is no longer visible, but probably not for long. Note in the article that Sedona, Ariz. has become an international dark sky area - it is possible to stop the pollution if communities and their governments have the will.