Near Lugnagall, roughly 200 metres south of the Drumcliff River, a raised circular platform some 31 metres in diameter sits quietly in the grass, its perimeter defined by an earthen scarp rather than the more dramatic bank-and-ditch arrangement that many ringforts retain. The ditch, known as a fosse, has either silted away entirely or was never cut here in the first place; either way, nothing of it remains visible at ground level.

Ringforts, or raths, were the dominant form of enclosed farmstead in early medieval Ireland, typically dating from roughly the sixth to the twelfth century. Most housed a single family and their livestock, with the enclosing earthwork providing a degree of protection against opportunistic cattle raids rather than any serious military threat. The Lugnagall example is a modest but characteristic specimen: circular, earthen, and set in agricultural land that has likely been farmed continuously since the fort was first raised. No original entrance survives in a recognisable form, which is common enough where centuries of grazing and ploughing have softened the edges of the earthwork without obliterating it altogether. The proximity to the Drumcliff River, a watercourse associated with one of the more celebrated stretches of landscape in County Sligo, hints at why someone chose this particular piece of level ground; reliable water and workable pasture have always been the essentials.