Most cashels, the dry-stone walled ringforts of early medieval Ireland, are roughly circular. This one is subsquare, its corners rounded and its sides gently curved, giving it an almost intermediate character, neither fully round nor fully rectangular. Vegetation has crept over much of the structure, but the wall still stands up to 1.3 metres high in places and reads clearly across the ground, measuring approximately 28.5 metres east to west.

A cashel is essentially a ringfort built from stone rather than earthen banks, typically associated with the early medieval period in Ireland and thought to have served as a defended farmstead or the enclosure of a person of some local standing. What makes the Deelin More example particularly worth attention is the evidence of internal occupation. Along the southern interior, the foundations of at least one rectangular building survive, suggesting the space was used for more than livestock. An additional enclosure is attached at the eastern side, a common arrangement where a secondary space, sometimes called an annexe, provided room for animals or agricultural activity separate from the main living area. A field wall also extends from the north-western corner, hinting at a landscape that was once more extensively organised around this central point. The site was brought to the attention of the National Monuments Service by Michael Gibbons.