Guelbenzu operates in Ribera del Queiles, a subregion of Navarra in northern Spain known for blended reds that marry traditional Spanish varieties with international grapes. The winery's portfolio centers on Tempranillo and Syrah, often in combination with Merlot, Graciano, and Cabernet Sauvignon. Lombana, a five-grape blend anchored by Syrah and Tempranillo, represents the winery's approach to structured, layered reds. Vierlas, a pure Syrah expression, showcases the variety's darker fruit and spice character in the region's continental climate. Azul, a single-varietal Tempranillo, draws on the grape's natural acidity and earth-forward profile. The wines have been assessed by Wine Spectator, Wine Enthusiast, and Wine Advocate.