• Situated in eastern Wiltshire, south of the village of Fosbury, near Marlborough and Hungerford.
• Rests on Knolls Down, at a height of 254m AOD (slightly below the summit of Haydown Hill at 258m AOD).
• Excellently defended to the south, southwest, and east due to steeply sloped terrain.
• To the north, the land is less steep and is largely bounded by Oakhill Wood.
• Easily accessible by public footpaths.
• Bivallate Defenses: The hillfort is characterized by two concentric lines of earthworks (ramparts and ditches), though it is believed to have never been fully completed. These defenses are particularly impressive on the southwestern arc, offering views into the Hippenscombe valley.
• Size: It is an oval-shaped site, covering approximately 26 acres (11 hectares).
• Entrances: The main entrance is located on the eastern side, featuring "inturned parallel banks." There's also a "north gate" accessible through Oakhill Wood.