For the 2011 play of this title, see South Downs (play). The South Downs is a range of chalk hills that extends for about 260 square miles across the south-eastern coastal counties of England from the Itchen Valley of Hampshire in the west to Beachy Head, near Eastbourne, East Sussex, in the east. It is bounded on its northern side by a steep escarpment, from whose crest there are extensive views northwards across the Weald.