It is considered part of the Mendoza region, but the Uco valley can be recognized in its own right on several counts. Among Uco’s merits is its higher-altitude location at the foot of the Andes Mountains; the valley´s (San Carlos , Tunuyan and Tupungato) altitudes of 2800 ft 3600 ft (1100m) average benefit from high daytime temperatures which drop to cool at night. This allows the grapes to produce balanced sugars and acidity while achieving phenolic ripeness. The dry continental climate brings little rain .Soils in the Uco Valley are alluvial and fairly uniform: a clay and rock base with a stony, sandy surface. These free-draining soils are excellent for quality viticulture as they stress the vines, leading to decreased vigor and lower yields, and consequently wines with a higher concentration of flavor