The castle occupies a triangular outcrop of rock on the river’s south bank, where the waterway curves dramatically from west through north to east around the promontory. Behind the fortification, a 20-metre cliff face runs northeast to southwest, providing natural defence whilst the surrounding coniferous forest now obscures what would have been commanding views across the medieval landscape.

The ringwork itself forms a distinctive D-shaped enclosure measuring 38 metres east to west and 36 metres north to south. Its defensive earthworks remain impressively intact; an earthen bank 9 metres wide rises 5.2 metres on its exterior face, whilst a flat-bottomed fosse, or defensive ditch, runs along the eastern and southern sides. This ditch varies in width from 2.5 to 4 metres at its base and plunges 4 metres below the interior level. Beyond the fosse, an outer bank provides an additional line of defence, particularly substantial on the southern approach where it stretches 8.4 metres wide and stands 1.7 metres high. The original entrance survives at the south, where a narrow causeway just 1.2 metres wide crosses the defensive ditch.

Within the protected interior, archaeological evidence suggests this was once a bustling fortified settlement. Two circular depressions, each about 4 metres in diameter, likely mark the locations of round houses or storage structures, whilst three rectangular areas measuring between 5 by 7 metres and 5 by 12 metres probably indicate the foundations of timber buildings. These features paint a picture of a well-organised defensive site that would have housed a small garrison or noble household, controlling river traffic and protecting the surrounding lands during the turbulent medieval period.