Protos produces Tempranillo and Tinto Fino from Castilla y León, Spain's expansive region of continental plateaus and diurnal temperature swings. The winery's portfolio centers on age-worthy reds that reflect the terroir's structure and depth. Selección Finca el Grajo Viejo, a Tempranillo, and Gran Reserva, crafted from Tinto Fino, both achieve an average prestige rating of 93.3 across assessments by Wine Enthusiast, Wine Spectator, Decanter, Wine Advocate, and Falstaff. The Reserva 5 Año, also Tinto Fino-based, rates at 92.0. These wines demonstrate the character typical of the region: dark fruit, mineral undertones, and the aging potential that defines Castilian reds. Protos' focus on reserve and selection tiers signals a commitment to extended maturation and complexity.