Sierra de Gredos is the mountainous region located on the continental divide of Spain. It is a transitional zone where Northern Spain gives way to Southern Spain. This mountainous area is located about an hour and a half due west of Madrid and is split between three provinces: Madrid, Ávila, and Toledo. It also belongs to three autonomous political units: Madrid, Castilla y León, and Castilla-La Mancha and, therefore, three political, rather than geographical, appellations known as Vinos de Madrid, Vino de la Tierra Castilla y León, and Méntrida. Due to this confusion, which is irrelevant to consumers, most producers have gone their own way with labeling: focussing on their own brand identity instead of a regional approach.
Within the Sierra de Gredos umbrella, significant village names are often listed, such as Cebreros (unique for having red slate), Navarrevisca, Navatalgordo, Cadalso de los Vidrios, and San Martín de Valdeiglesias.
The wines from the Sierra de Gredos mountains to the west of Madrid (aka Vinos de Madrid) have finally begun to claim their rightful place alongside other top wine regions focussed on producing world-class garnacha. For many insiders, the region is now considered to be leading the conversation concerning the potential of this Mediterranean grape, now understood to be indigenous to Spain.