The site consists of a spread of burnt and shattered stone roughly sixteen metres north to south and nine metres east to west, the characteristic footprint left behind when generations of use reduced hearthstones to crumbled, fire-cracked fragments. A stream runs to the south, which is entirely typical of these features; access to water was not incidental but essential to how they functioned.

Fulachtaí fia, the plural form, are among the most commonly recorded prehistoric monument types in Ireland, yet they remain genuinely puzzling in some respects. The standard explanation is that they served as outdoor cooking sites, most likely during the Bronze Age, where water was heated by dropping fire-heated stones into a trough. The stones fracture under repeated thermal shock and accumulate into the low, often horseshoe-shaped mounds that survive today. The Cappagh example, sitting on its sloped ground with the creek below, fits this pattern closely. Whether the site was used seasonally, by a settled community, or in connection with some other activity beyond cooking is the kind of question the burnt spread itself cannot answer.