Barely 5 km wide, this area is the narrowest part of the valley as it ascends sharply towards the moorland on its northern and southern sides. The orography resembles the original terrain thus showing less soil complexity. This stretch of land includes terraces on the river Duero, slopes climbing to the moorland and the flat moorland itself. A few top estates like Vega Sicilia, Hacienda Monasterio, Finca Villacreces or Arzuaga are located in this area.