St. Lucas operates in Mendoza, Argentina's premier wine region, where high altitude and intense sunlight shape bold red and white wines. The winery's Malbec draws on Mendoza's signature varietal strength, a grape that thrives in the region's continental climate and gravelly soils. Alongside Malbec, St. Lucas produces Torrontés, the aromatic white variety native to Argentina, and Cabernet Sauvignon, which finds expression in Mendoza's warm, dry conditions. Wine Spectator and Wine Enthusiast have rated the portfolio, with the Malbec and Torrontés leading the range in critical assessment. The winery's focus on these three varietals reflects both regional tradition and the specific terroir advantages of Mendoza.