This vineyard is located in the most southern outpost of Monterey County in the Cholame Valley near Parkfield, California, and is almost 2,000 feet in elevation. It is dry (they get an average of 14 inches of rain a year, but in the last few years have barely received any) and hot in the summers, but can also experience a big diurnal shift between daytime highs and nighttime lows. The soil is calcareous/shaley loam. All of this amounts to a perfectly challenging place to grow grapes that like living on the edge of things.
Tempranillo prefers the edge, apparently. The environment in Cholame is very similar to the environments of Spain and Portugal where Tempranillo has been grown historically. In that Mediterranean climate, there is also a large diurnal shift in temperature which allows the flavors of the grape to develop in the cooler nighttime but the heat creates color in the thick skins of the grape.