The South Downs National Park  is England's newest National Park, having become fully operational on 1 April 2011.The park, covering an area of 1,627 square kilometres (628 sq mi) in southern England, stretches for 140 kilometres (87 mi) from Winchester (England) in the west to Eastbourne in the east through the counties of Hampshire, West Sussex and East Sussex.The South Downs passes through the counties of East Sussex, West Sussex and Hampshire.
Into Hampshire, the downs lose the steep north-facing escarpment characteristic of the downs in Sussex. The south Downs are the remnants of the former Wealden Anticline, which stretched across Sussex, The chalk was laided down between 100 and 65 million years ago, on top of the weaker Greensand and Sandstone which makes up much of the Weald, the beds were then folded from 30 to 1 million years ago, the top of the chalk was then eroded, leaving two nearly parallel ridges, which is why 'The Downs' form a long ridge. The Downs have undergoing inhabitation since the Stone Age, with Britain's earliest human remains dating from 500,000 years ago found at Boxgrove.
The South Downs are home to some of Britain's earliest mines, numerous camps, barrows, hill forts and figures on the hills.
There are remains dating from The Bronze Age to the Second World War, the Battle of Lewes was fought on the downs and in the Elizabethan times their height was used for beacons (this is preserved within names, such as Firle Beacon).
The South Downs extend about 70 miles (100 km) through East Sussex, West Sussex, and part of Hampshire.
Check out Traveline South East for full transport routes.
If you want to travel by car (advised) the A27 runs parrel to the South Downs, with various roads passing through the area (A23, A284, A24 and more).
A popular way is by foot, bike or horse, there is a route through the park (South Downs Way) which will take you over some of the best scenery in the UK (and you're not really affected by traffic).
The Devil's Dyke is the largest chalkland dry combe (a big waterless valley) in Britain and home to many associated plants and butterflies.
The South Downs Way is a bridleway that follows the South Downs.