Undurraga produces wines from Chile's Rapel Valley, a region in the Central Valley known for its warm climate and diverse terroir. The winery's portfolio centers on Carignan, a variety that thrives in this environment and forms the backbone of their flagship Vigno (Vignadores de Carignan). Their Red Field Blend—a multi-varietal composition of Carignan, Cabernet Sauvignon, Malbec, Cinsault, and Pais—demonstrates the complexity possible from the region's native and international grapes. Altazor, a Carménère and Cabernet Sauvignon blend, reflects the winery's engagement with Carménère, Chile's signature varietal. These wines have been assessed by major critics including Wine Advocate, Wine Enthusiast, Wine Spectator, Decanter, and Falstaff, earning strong prestige ratings that reflect their technical quality and structure.