The castle is a rare example of Gothic-Mudejar military architecture in the Madrid region.
Construction transitioned from an earlier Islamic fortification to the existing stone structure in the 15th century.
The castle was declared a National Monument in 1931.
It was the site where Juana la Beltraneja lived for a period during the Castilian War of Succession.
The defensive walls of the castle are integrated into the larger walled circuit of the town, which is one of the best-preserved medieval enclosures in Spain.
The pentagonal tower design was specifically chosen to deflect projectiles during sieges.
The masonry incorporates 'verdugadas' (brick bands) typical of the Toledo-style construction methods.
The Castle of Buitrago, also known as the Castle of the Mendoza, is a 15th-century Mudejar-style fortification located within the historic walls of Buitrago del Lozoya. It sits on a rocky outcrop surrounded by a meander of the Lozoya River, which served as a natural defensive barrier. The structure features seven towers, including a pentagonal keep, all built using local stone and brickwork. It served as the residence of the Marquesses of Santillana and played a significant role in the defensive systems of the Community of the City and Land of Buitrago. While much of the interior is in ruins, the exterior walls remain largely intact and have undergone archaeological restoration. It is the primary defensive monument in the Madrid region's northern mountain range. The castle grounds are frequently used as a venue for local cultural events and theatrical performances. Visitors can access the wall walk to view the defensive architecture and the surrounding river valley.
From the bridge crossing the Lozoya River (Puente del Arrabal) looking up toward the southern wall and towers.
Walk the entire perimeter of the medieval walls for the best perspective on how the castle connects to the town's defensive system.
Check local event calendars before visiting, as the castle courtyard often hosts evening open-air concerts or medieval-themed festivals.
Wear comfortable, flat walking shoes as the surrounding town streets and wall paths are made of uneven, historic cobblestones.
Do not attempt to climb on the exterior stone masonry, as the structures are preserved heritage sites.
The site is typically closed on Mondays and follows seasonal hours, with longer operating days during summer months.
Maintain silence when near the private residential areas within the walled town; stay on marked paths during castle tours.
