It sits in the official record as a named monument, classified and catalogued, yet the substance of what it is, how old it might be, and what form it takes on the ground has not yet been made available in any accessible form. That gap between a place being known to exist and being known at all is, in its own way, revealing about how much of Ireland's landscape remains formally unexamined at the surface level.

Enclosures of various kinds appear throughout Mayo and the wider west of Ireland, ranging from early medieval ringforts, which were typically circular earthen or stone boundaries enclosing a farmstead, to much earlier prehistoric enclosures whose purposes are still debated. Without further detail specific to this site, it is not possible to say which tradition Knockadoon's enclosure belongs to, what its dimensions are, or whether anything is visible above ground today. The townland name itself, Knockadoon, derives from the Irish Cnoc an Dúin, meaning the hill of the fort, which at least suggests a long local awareness of something defensive or enclosing in the landscape, even if the precise monument has yet to be fully described in the public record.