Bodegas Eguren produces wines from Castilla, Spain's vast central plateau. The winery works primarily with Tempranillo, the region's signature variety, alongside Shiraz to create distinctive blends. Mercedes Eguren Shiraz, a Tempranillo-Syrah blend, represents the house's approach to marrying indigenous Spanish character with international grape varieties. The portfolio also includes Reinares Rosé, made from Tempranillo, and a varietal Tempranillo Castilla expression. Wine Spectator and Wine Enthusiast have both assessed the winery's output. The wines reflect Castilla's continental climate and high-altitude terroir, where Tempranillo develops structure and mineral precision.