El Principal operates in the Maipo Valley, Chile's premier red wine region, where the cool Pacific influence and alluvial soils create ideal conditions for Bordeaux and Rhône varieties. The winery's portfolio centers on structured, age-worthy blends that reflect the valley's signature character. Calicanto—a five-variety blend of Cabernet Sauvignon, Shiraz, Cabernet Franc, Petit Verdot, and Carménère—anchors the range, joined by Andetelmo, a Cabernet-led trio with Petit Verdot and Cabernet Franc, and Memorias, which layers Petit Verdot, Cabernet Sauvignon, Cabernet Franc, and Shiraz. These wines have been assessed by Wine Spectator, Decanter, and Wine Advocate. The Maipo Valley's continental climate and deep soils yield wines of depth and balance, where tannin structure and acidity define the terroir.