It measures roughly 16 metres north to south and 27 metres east to west, rising only half a metre or so above what is now very shallow water. Its edges are steep and even, its upper surface scattered with irregular limestone slabs, and along its northern edge, larger angular boulders up to two metres in length have been arranged in what appears to be a deliberate kerb facing the water. A broad, level causeway connects it to the modern shoreline. The water level here has dropped over time; the platform would originally have sat in about a metre of water, some 60 metres from the ancient shoreline.

The site was first recorded as part of a cluster of rock platforms along the eastern shore of Rochfort Bay, identified by Karkov and Ruffing in research carried out in 1990 and 1991. Aidan O'Sullivan later examined it more closely, placing it in the context of the broader lakeshore archaeology of Lough Ennell. The working interpretation is that this is a possible prehistoric or early medieval rock platform, a category of site associated with lake-edge activity and, in some cases, with crannógs. A crannóg is an artificial or modified island used as a dwelling, typically in the early medieval period in Ireland and Scotland, though some examples date earlier. The nearest such site is the crannóg at Goose Island, roughly 400 metres to the north, and the platform is thought to be potentially connected with activity around that site. A mound lies 550 metres to the east within the same demesne. The deliberate arrangement of the kerb stones, combined with the causeway linking the platform to shore, suggests this was not simply a natural outcrop but a place shaped, at some point, with clear purpose.