The ''sabana'' is bordered to the east by the Eastern Cordillera of the Andes mountain range. The Eastern Hills, which limit city growth, run from south to north, and form east of the center the Guadalupe and Monserrate mountains. The western city limit is the Bogotá River. The Sumapaz Paramo (moorland) borders the south and to the north Bogotá extends over the plateau up to the towns of Chía and Sopó.