The concept of 'high-altitude wine' has no universal legal definition in Argentina, but the oenological consensus places the threshold at 1,500 meters above sea level. Cafayate, in the Calchaquí Valleys of Salta, sits at around 1,683 meters and has been the historical reference for Argentine high-altitude wines. The vineyards of the Quebrada de Humahuaca in Jujuy lie between 2,000 and 3,329 meters — the elevation of the Moya vineyard in Uquía, considered the highest in the Americas. That difference of more than 1,000 meters above Cafayate is not trivial: it is the difference between a high-altitude wine and an extreme-altitude wine.
The three variables that define the character of these wines are thermal amplitude, ultraviolet radiation and water scarcity. Thermal amplitude in the Quebrada can exceed 25°C between day and night during the ripening season (January-March): warm days allow the synthesis of sugars and aromas, while cold nights slow the grape's metabolism and preserve acidity. The result is a grape that reaches harvest with high sugar concentration, firm acidity and intense aromas. UV radiation at those altitudes — where the atmosphere is thinner and filters less — stimulates the production of anthocyanins and polyphenols in the grape skin: the compounds responsible for the intense color, ripe tannins and aromatic complexity that characterize Jujuy's wines.


