The Pinot Grigio or Pinot Gris grape varietal is now one of the most widely grown vines in the world, due to the surge in popularity of Pinot Grigio wines over the past twenty years or so. These grayish-blue fruits, which hang in their distinctively conical bunches, are responsible for a very broad range of wines famous for their variety of color tones and flavors Pinot Grigio varietal grapes are highly influenced by terroir, climate and particularly the skill and expertise of the vintners who process them. As such, there are full bodied, amber colored wines made from this grape, and there are equally delicious yet far leaner, paler, lighter bodied and crisp white wines made from the same species in other parts of the world. California's beautiful and remarkably fertile Sonoma Valley has grown over the decades to become one of the United States' most respected and profitable wine regions, with wineries within the region benefiting from the superb Californian sunshine, low rainfall and wonderfully rich soils. Because of this vital combination of excellent conditions, the region is able to grow a wide range of grape varietals for use in the production of an impressive array of wines, with many different red and white wine grapes flourishing each year and producing excellent and characterful results. The soils have been enriched by volcanic activity, and the presence of geothermal springs, which make this region a unique one, and very much the beating heart of California's ever growing wine industry.