Aerial panorama over Peña Lengua, south from Alarcia, an area belonging to the Natura 2000 European Network. This is the way up to the peaks Trigaza (2.086) and San Millán (2.131), the highest in the province of Burgos. The routes begin in the parking lot of Alarcia, free and provided with a caravan service area, as well as an elctrical vehicles charging station.