Though nothing remains visible at ground level today, tradition marks this spot as the burial ground for soldiers who fell during a fierce clash between two of Ireland’s most powerful medieval dynasties in 1435 AD.

The battle pitted the O’Donnells against the O’Neills, two Gaelic families whose territorial disputes shaped much of Ulster’s medieval history. The O’Donnells, who controlled much of what is now Donegal, frequently found themselves at odds with the O’Neills of Tyrone; both clans vied for dominance over the northern provinces throughout the 15th century. This particular confrontation at Loch an Iúir would have been one of many such encounters, though the fact that local tradition has preserved its memory for nearly 600 years suggests it held particular significance for the surrounding communities.

Today, visitors to this quiet hillside will find only bog vegetation and views across the loch, with no markers or monuments to indicate the ground’s historical importance. The absence of visible remains is typical of many medieval battle sites across Ireland, where wooden crosses and temporary burial markers have long since decayed into the acidic peat. Yet the persistence of oral tradition, passed down through generations of local families, ensures this overlooked slope remains connected to one of the bloodier chapters in Donegal’s past.