Small enough that a casual walker might step across it without registering its presence, the mound measures roughly seven metres by six at its base and rises no more than half a metre at its tallest point, with a flattened top and uneven, eroded edges that suggest considerable age.

The Ordnance Survey's first edition map labels the site simply as 'Carn', a word used in Irish for a cairn or burial mound, typically a heap of stones raised over the dead, though here there is no visible stonework remaining, only earthwork. By the time the six-inch OS revision appeared in 1916, it had acquired the name 'Laght Finne', a phrase that combines the Irish word 'leacht', meaning a memorial heap or grave monument, with a personal name, Finne, suggesting a specific individual was once commemorated here, even if that person's identity is now entirely lost. The same six-inch maps also carry a third designation for a nearby feature: 'O'Donoghue's Chair', a name that implies some local tradition of a stone seat or prominent rock associated with a figure called O'Donoghue. Whatever gave rise to that name, no stone structure has been identified at the location, and the story, if there ever was one, has not survived in any recoverable form. What remains is a quietly ambiguous earthwork on an exposed hilltop, wearing three names like layers of sediment, each one pointing toward a meaning that the landscape itself no longer makes legible.