The grapes are grown in the Sierra de Gata northwest in the province of Caceres. The vineyards are located in high altitude sites of between 700 to 1,100 metres above sea level, where the vines grow typically in small terraced parcels surrounded by pine woods. The diurnal temperature fluctuations at this elevation encourage a long, gradual ripening season for the fruit, producing concentrated flavours from the warm, sunny days and fresh, balancing acidity from the cool nights. The ancient bush vines are up to 90 years old and produce low yields of concentrated juice. Planted in decomposed granite soils, these vines produce fine, elegant wines. The vineyards are planted with several unusual varieties, most not planted elsewhere in Spain. The vines are hand-harvested as a field blend.