This earthwork fortification, roughly sub-rectangular in shape, measures approximately 42.5 metres north to south and 37.5 metres east to west. The site appears to have been created by modifying the natural ridge, with particularly steep scarps on the northern and eastern sides reaching heights of 3.1 metres, whilst the western approach remains relatively accessible with a scarp of only 0.3 metres.

The defensive perimeter is primarily defined by these scarps, except in the northwest sector where evidence of an earthen bank survives, measuring 2 metres wide with an internal height of 0.45 metres and an external height of 2.76 metres. The southern side features a more modest drop than its northern and eastern counterparts, creating a varied defensive profile that took advantage of the natural topography. Today, the interior remains as a grass-covered space, free from other vegetation, allowing visitors to appreciate the original footprint of this Norman fortification.

Located about 600 metres northeast of Knocknagapple church, also known as Templetenny, this ringwork represents the type of earthwork castle favoured by the Anglo-Normans during their initial colonisation of Ireland in the late 12th and early 13th centuries. These fortifications served as administrative centres and defensive strongholds, typically consisting of a raised circular or oval enclosure surrounded by a ditch and bank, often with a wooden palisade and internal timber buildings that have long since disappeared.