One of the most difficult wine grapes to produce is the pinot noir. The Santa Rita Hills in Santa Barbara County, California, leads the world in the production of this grape. Weatherwise Magazine reports that a series of mountains in southern California that strike east-to-west are known as the Transverse Ranges. The Mediterranean climate and diverse soils also are the ingredients for these exceptional grapes. With the La Purisima Hills to the north, the Santa Rosa Hills to the south, and traversed by the Santa Ynez River another wine-growing component is identified. Cool Pacific fog constantly invades the area and follows the Santa Ynez River. Morning fog blankets these grapes followed by mid-morning sunlight and Pacific breezes.