Darien produces wines from Rioja, Spain's most celebrated red wine region. The winery works with the classic grapes of the Rioja terroir: Tempranillo as the backbone, alongside Garnacha for richness and Graciano and Mazuelo for structure and complexity. Delius, a Tempranillo and Garnacha blend, represents the winery's top expression. Seleccion layers Garnacha, Mazuelo, Tempranillo, and Graciano into a more intricate blend, while Reserva emphasizes Graciano, Mazuelo, and Tempranillo for depth and aging potential. These wines have been assessed by major critics including Falstaff, Wine Spectator, Wine Enthusiast, Wine Advocate, and Decanter, reflecting their place within serious Rioja production.