An Iron Age to Early Medieval promontory fort defined by a bank and ditch across the peninsula roughly at right-angles to the coastline. The bank and ditch tend to fade away on the west side but east of the tarmac road it gets larger as it gets to the highest point of the peninsula and down to the cliff edge on the east side. The earthwork faces north at its highest, where the bank is some 8 metres wide and 2 metres high fronted by a ditch 5 metres broad and 0.5 metres deep. East of this the remains of the bank could be interpreted as indicating it was unfinished and there are lengths of berm between the dumps of the bank and the inner edge of the rock-cut ditch. The whole is grass-covered with gorse on it in places. At the highest point it has a modern building on top. A stone wall runs along part of the ditch in its western half and it appears that a stone wall may have run along much of the centre of the bank since there is a robbers trench.  At the extreme southwest corner of the peninsula there are 3 lines of bank and rock-cut ditch cutting off the furthest point. The easternmost is short and runs from small natural bay to small inlet and the ditch may follow a natural rock fracture. Above it is a low bank in good condition. At the next break in the rock there is a major rock-cut ditch cutting across the grain of the bedrock, leaving a well-shaped steep-sided causeway, giving an entrance through an in-turned bank. Stones of outer facing are still in position to the north of this entrance. There is a similar slighter defence across the last bit of the peninsula. At the top of a modern path cut into the shillet is an original in-turned entrance with low stone-faced revetment and stones in position on both sides. A cross-dyke cutting across the peninsula is presumably an outwork to the fort on the point.