Viña Altair produces wine in Castilla, Spain's vast central plateau. The winery focuses on Tempranillo, the country's signature red grape—a variety known for its dark fruit character, moderate tannins, and ability to express terroir across diverse Spanish regions. The Tempranillo Dulce demonstrates the grape's capacity for sweetness and concentration. Wine Spectator and Wine Enthusiast have both assessed the winery's output, providing critical perspective on its work.