Which high-altitude Mendoza area is famous for bold Malbec and high acidity?

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Altitude and diurnal temperature swing shape how Malbec expresses itself in Mendoza. The Uco Valley sits at higher elevations than the surrounding Mendoza zones, with vineyards often around 900 to 1,300 meters or more. That elevation cools nights and slows ripening, helping preserve acidity while warm daytime sun concentrates flavor. The net effect is Malbecs with bold structure and color, yet with noticeable freshness and higher acidity that keeps the wine lively on the finish. This combination is what the high-altitude Mendoza area known for bold Malbec and high acidity look like in practice, making The Uco Valley the standout region for this profile.

For context, Maipú and Luján de Cuyo are within Mendoza but are not defined by the same high-altitude extremes as the Uco Valley, and Cafayate is in a different wine region (Salta), not Mendoza.