[3] The hill fort is on an easterly spur from the main Quantock ridge, with steep natural slopes to the north and south-east.

The fort is triangular in shape, with a single rampart and ditch (univallate), enclosing 1.8 hectares (4.4 acres).

There is a linear outer work about 120 m away, parallel to the westerly rampart, enclosing another 1.8 ha.

There was a tunnel, which has now been filed in, which gave the camp safe access to a nearby spring for water.

[4] It was common for ancient hill forts to be reused as pens for domesticated animals in the Medieval period, and there is documentary evidence that Ruborough became a porcheria, or piggery, owned by the Saxon domain of Somerton.