The main rampart and external ditch (univallate) run for over 2 km along an east-west ridge parallel to the coast, which lies about 750 m to the south.

At the western end, an incomplete series of ramparts curve back to the cliffs of Lulworth Cove.

At the eastern end, the main rampart reaches the cliffs on the north side of Mupe Bay.

The ranges are owned by the Ministry of Defence (MoD) and is part of the Armoured Fighting Vehicles (AFV) Gunnery School.

[2] Visitors are advised to keep to official footpaths and abide to local site notices, because tanks and Armoured vehicles are used in this area.