No earthwork remains visible at the surface, no bank, no ditch, nothing that would tell a passing eye that anything of significance ever stood here. What survives instead is a name. Local knowledge identifies the field as "lios field", a designation that points directly to the Irish word "lios", one of the common terms for a ringfort, the circular enclosed farmsteads that were built across Ireland in their thousands during the early medieval period, roughly between the fifth and twelfth centuries. The name has outlasted the monument itself.

Ringforts of this type, also known as raths, were typically formed by one or more earthen banks and ditches enclosing a roughly circular area used for habitation and the protection of livestock. That this one sits within a field still carrying its old Irish memory in the placename suggests it was recognised locally long after any physical trace faded. Nearby, in the south-western corner of the same field, there is a possible fulacht fiadh, a type of prehistoric cooking site usually identified by a horseshoe-shaped mound of burnt and shattered stone accumulated beside a trough or pit. The two features together, one early medieval and one potentially much older, suggest this slope on Coolfree Mountain was visited and used across a considerable span of time, even if neither monument now announces itself to the eye.