Rectangular in plan, roughly a metre long and half a metre wide, and standing just 0.8 metres above ground, it is not the kind of monument that announces itself from a distance. What it does suggest, however, is that it was never meant to stand alone. A second stone, positioned near a ditch to the east, was removed relatively recently according to local memory, and the stone that remains shows the particular wear that comes from generations of cattle rubbing against its angles, a slow erosion that says as much about Irish farming continuity as it does about the stone's age.

Standing stones are among the most common yet least understood monument types in the Irish landscape. Erected from the Bronze Age onward, they served purposes that likely shifted over time and place, from burial markers to territorial indicators to focal points in ritual activity. This particular stone is orientated NNW-SSE and has a packing stone wedged at its base on the western side, a deliberate piece of stabilisation that suggests care in its original placement. What makes its situation more suggestive still is the density of related monuments nearby. A further standing stone and an enclosure sit approximately 45 metres to the east, and another standing stone lies roughly 220 metres to the west-southwest. Whatever this slope once meant to the people who shaped it, the Glennaskagh stone was clearly not an isolated gesture.