Stone walls, roughly a metre thick and half a metre high, push up intermittently through the peat across an area of approximately 500 metres east to west and 300 metres north to south, tracing the outlines of fields that have not been actively farmed for a very long time. The bog has swallowed much of it, but what survives is enough to read: irregular, curvilinear boundaries dividing the hillside into fields of varying shapes and sizes, the kind of layout that speaks to gradual, organic use of land rather than any single planned episode of enclosure.

Within the field system, at least nine hut sites have been identified alongside two enclosures, which together suggest a settlement of some substance once occupied this rough hill pasture. Curvilinear field systems of this type are generally associated with early medieval or prehistoric land use in Ireland, periods when communities organised agricultural and pastoral life across upland slopes before peat growth, abandonment, or both gradually erased the evidence. The Gearhanagoul system is set in the kind of terrain that was marginal even when it was in use, a south-facing aspect offering the best available light and shelter on an otherwise exposed hillside. The nine hut sites distributed across the area point to something more than seasonal activity; this was, at some point, a place where people lived as well as worked the land.

The walls themselves are not dramatic to look at. They protrude in stretches, interrupted by gaps, more suggestion than boundary, and the bog surface around them can be uneven and soft underfoot. What makes the site worth attention is precisely the scale of what remains legible despite centuries of encroachment: an entire field system, with its enclosures and domestic structures, quietly persisting on a Kerry hillside above a stream valley that most people pass without a second thought.