Folkestone Downs stretch for 5 kilometres from East Cliff and Warren Country Park in the east to Peene Quarry in the west. The downs rise steeply above the town of Folkestone to heights in excess of 150 metres. The highest point is Dover Hill at 170 metres. The Channel Tunnel Terminal lies at the foot of the downs and the British portal is directly below the slopes of Castle Hill. The downland is classified as CG4 Brachypodium pinnatum and CG5 Bromus erectus - Brachypodium pinnatum calcareous grassland with smaller areas of CG2 Festuca ovina - Avenula pratensis grassland. There are also areas of scrubland and woodland.