A ringfort, or rath, was typically a farmstead enclosure of the early medieval period in Ireland, defined by one or more earthen banks and ditches thrown up around a domestic or agricultural space. Here at Knocknagranshy, that enclosure has survived in fragmentary but identifiable form, quietly sitting in elevated ground on a slight east-facing slope.

When the Archaeological Survey of Ireland recorded the site in 2000, they measured a circular raised area roughly 30 metres in diameter. The defining bank has been largely reduced to a scarped edge, meaning the outer face has eroded into a sharp slope rather than retaining its original upstanding profile, though it still stands around 0.6 metres high at points. Notably, stone revetting, that is, a facing of stones used to stabilise and reinforce the bank, remains visible along the southern to north-western arc. Beyond the bank, an external fosse, the technical term for the ditch that would originally have complemented the bank, survives to a width of 2.8 metres and a depth of around 0.4 metres. Subsequent agricultural activity has left its mark too: a field boundary runs along the outer edge of the fosse from north-east to south-east, and a remnant boundary cuts through the monument itself at the south. Some 160 metres to the south lies Knocknagranshy Church and its associated graveyard, suggesting this small area has carried human significance across several different periods.

The site sits in working pasture, so access will depend on landowner permission. The interior, described as level but densely overgrown as recently as a Google Earth image from February 2020, may be difficult to read on the ground, though the scarped bank edge and traces of the fosse should be visible to an observant eye from the field margins. The views from this elevated position are wide in most directions, which would have made the site strategically well-placed in its original use, and that same openness helps give a sense today of how prominently this small enclosure once sat within its agricultural surroundings.