Valle de Uco

Vineyards have existed in Valle de Uco at least since the 1920s, planted by Italian and Spanish immigrants, but the region was considered too remote from Mendoza's consumers and production facilities to be truly viable. Traditionally, Uco Valley grapes were blended into wines from warmer areas for color and acidity, rarely appearing on labels in their own right. The modern era began in 1992 when Nicolás Catena Zapata planted the Adrianna Vineyard in Gualtallary with a single goal: to find the coolest location for growing vines in Mendoza. Shortly afterward, Dutch entrepreneur Mijndert Pon arrived in Mendoza in 1995, purchased vineyards in the Uco Valley that same year, and in 1996 established Bodegas Salentein, planting the region's first high-altitude Malbec at 1,300m above sea level in 1997. These two pioneering projects transformed a remote agricultural valley into one of the most talked-about wine regions in the Southern Hemisphere.

• La Celia, established in 1890 by Eugenio Bustos and named for his daughter, is the oldest winery in the Uco Valley and was the first to plant Malbec in the region
• Nicolás Catena Zapata planted the Adrianna Vineyard in Gualtallary in 1992, initially with Chardonnay, Pinot Noir, and Merlot, before later adding Malbec, Cabernet Franc, and other varieties across 120 total hectares
• Bodegas Salentein, founded in 1996 by Mijndert Pon, was the first to label wines as 'Uco Valley' and is locally regarded as the region's locomotive, planting the first high-altitude Malbec at 1,300m in 1997

The Uco Valley is located approximately 100 kilometers southwest of Mendoza city and spans the three administrative departments of Tupungato, Tunuyán, and San Carlos, stretching roughly 70 kilometers from north to south through a tectonic graben formation along the Tunuyán River. Average annual rainfall is less than 200mm, making irrigation from Andean snowmelt essential. The annual average temperature is 14°C, with a diurnal swing of up to 20°C in summer and 18°C in winter. Soils are alluvial and largely composed of a clay and rock base with a stony, sandy surface rich in calcium carbonate. For every 500 feet of elevation gained, average temperature descends roughly one degree centigrade, which means traveling nine miles from a mild site to a cooler one at higher altitude is climatically equivalent to moving from the Rhône Valley to Champagne.

• Tupungato, the northernmost and highest subzone, includes the renowned Gualtallary district at up to 1,600m with calcareous, gravelly soils producing the valley's freshest and most mineral Malbec, Chardonnay, and Cabernet Franc
• Tunuyán sits in the central valley and includes Vista Flores and San Pablo GI (approved 2019), where some dry-farmed sites reach 1,700m, producing wines of pronounced vertical, mineral tension
• San Carlos, the southernmost and generally warmest subzone, contains the Paraje Altamira GI (approved 2013) at around 1,095 to 1,150m with loamy-clay and gravelly alluvial soils, producing structured Malbec and Cabernet Franc of notable depth

Malbec is the dominant grape of Valle de Uco and its signature variety, but the style differs markedly from warmer, lower-altitude Mendoza zones. High-altitude Malbec displays vivid violet and red fruit aromas rather than heavy dark fruit jaminess, with bright natural acidity, firm but fine tannins, and a mineral quality driven by calcareous and alluvial soils. Chardonnay has emerged as the most impressive white variety, particularly from Gualtallary and San Pablo, where high UV radiation, cool nights, and calcareous soils yield wines of citrus-driven precision and mineral salinity. Cabernet Franc is an increasingly celebrated secondary red variety, thriving in the cool, high-altitude conditions and producing wines with red pepper, spice, and floral notes alongside elegantly structured tannins. Cabernet Sauvignon, Syrah, and Sauvignon Blanc also perform well, and the trend toward earlier harvest, concrete vessels, and native yeast fermentation is shifting styles toward greater freshness and terroir expression.

• Malbec accounts for the majority of plantings and represents approximately 45% of regional wine production, with the high-altitude style showing fresh red fruit, floral aromatics, and mineral tension rather than the jammy fruit of lower-altitude versions
• Chardonnay from Gualtallary and San Pablo rivals cool-climate Burgundy benchmarks for precision, citrus character, and mineral salinity, making Valle de Uco the source of Argentina's finest examples
• Cabernet Franc, though less than a small fraction of total plantings, is generating enormous excitement, particularly from Gualtallary, where high elevation amplifies the variety's aromatic complexity and structural elegance

Catena Zapata remains the benchmark producer, with the Adrianna Vineyard in Gualtallary planted in 1992 at 1,450m elevation representing one of the most studied vineyard sites in the world. Zuccardi Valle de Uco, led by third-generation Sebastián Zuccardi and farming over 400 hectares from 900 to 1,500m, pioneered biodynamic certification in Argentina, achieving Demeter status across all holdings by 2016, and was named World's Best Vineyard four times between 2019 and 2022. Bodegas Salentein, founded in 1996 by Mijndert Pon and operating approximately 800 hectares of vineyards at 1,050 to 1,700m, was the first to plant in the San Pablo territory and first to label wines as Uco Valley. Achaval Ferrer, established in 1998 as a collaboration between Argentine and Italian partners, became internationally known for its trio of single-vineyard Malbecs from Finca Bella Vista, Finca Mirador, and Finca Altamira, and was acquired by Russia's SPI Group in 2011. Michel Rolland's Clos de los Siete, covering 430 hectares in Tunuyán planted primarily to Malbec, and organic pioneer Domaine Bousquet are among the other leading names.

• Catena Zapata's Adrianna Vineyard, planted 1992 at 1,450m in Gualtallary with calcareous, gravelly soils, has received more 100-point ratings than any other South American vineyard site
• Zuccardi Valle de Uco achieved full Demeter biodynamic certification across approximately 400 hectares by 2016, the first major Argentine producer to do so at scale, and opened its landmark stone winery in Paraje Altamira in 2016
• Bodegas Salentein, with 800 hectares at 1,050 to 1,700m, was the first bodega to put 'Uco Valley' on its labels and was instrumental in establishing the San Pablo GI, which gained recognition in 2019

Valle de Uco operates under the broader Mendoza Denominación de Origen (DO) framework. Argentina has only two Controlled Designations of Origin (DOC), both reserved exclusively for Malbec: DOC Luján de Cuyo and DOC San Rafael. Within Valle de Uco, a growing number of terroir-based Geographical Indications (GIs) have been established, defined by geological and climatic characteristics rather than political boundaries. Paraje Altamira in San Carlos was the first, approved in 2013, followed by San Pablo and Pampa El Cepillo, both approved in 2019. Other GIs operating within the valley include Los Chacayes and Valle de Tupungato. This appellation structure represents a significant philosophical shift from politically defined zones toward precision terroir mapping.

• No DOC exists within Valle de Uco itself; the valley operates under the Mendoza DO, with GIs providing the primary terroir differentiation
• Paraje Altamira (San Carlos, 2013) was the first GI in Argentina awarded on the basis of terroir research rather than political boundaries, establishing the template for subsequent GI designations
• San Pablo GI (Tunuyán, 2019) includes some of the valley's highest sites, with dry-farmed vineyards at up to 1,700m; Salentein was the first producer to plant and cultivate vines there in 1996

Roughly 100 kilometers south of Mendoza city and about a 90-minute drive, Valle de Uco has seen extraordinary investment in wine tourism over the past two decades. Bodegas Salentein's estate includes its landmark gravity-fed winery constructed in the shape of a cross, the Killka Center for Culture and the Arts housing Argentine and Dutch art collections, Posada Salentein luxury accommodation, and fine dining. Zuccardi's Espacio Piedra Infinita winery in Paraje Altamira, built entirely from local stone sourced on the estate, was named World's Best Vineyard four consecutive times and houses the acclaimed Piedra Infinita Cocina restaurant offering a seasonal tasting menu. The Vines Resort and Spa in Tunuyán offers luxury villa accommodation alongside its own wine production. The valley's combination of Andes scenery, architectural wineries, and some of Argentina's finest food and wine experiences has drawn comparisons to Napa Valley as a premium wine tourism destination.

• The valley runs approximately 70km north to south and 40km east to west, bounded by the Andes to the west and low hills to the east, bisected by tributaries of the Tunuyán River
• Bodegas Salentein's gravity-fed winery, constructed in the shape of a cross with an amphitheater-style central chamber, and its Killka cultural center housing 20th-century Argentine and Dutch works, are landmark architectural destinations
• Zuccardi's Espacio Piedra Infinita winery in Paraje Altamira was built exclusively from stone and natural materials found on the estate, integrating passive climate control and embodying the producer's commitment to terroir expression