Wedge tombs are the most numerous of Ireland's megalithic tomb types, constructed roughly between 2500 and 2000 BC during the late Neolithic and into the early Bronze Age. The name describes their shape: a roofed gallery, typically wider and higher at the entrance end and tapering toward the back, usually oriented to the west or south-west, possibly in alignment with the setting sun. They are found in greatest concentration in the west of Ireland, particularly in Clare, where the limestone landscape seems almost designed to preserve them.

Killanena itself is a small rural parish in the barony of Tulla Upper, sitting in the transitional zone between the flat plains of east Clare and the lower slopes rising toward the Slieve Bernagh hills. This part of Clare was settled and farmed in prehistory, and the presence of a wedge tomb here fits a broader pattern of late Neolithic and Bronze Age activity across the region. Such tombs functioned as communal burial monuments, though they also likely served as markers of territory and ancestral connection for the farming communities who built them. The capstones and orthostats, the large upright slabs forming the walls, could weigh several tonnes, and their placement required both considerable organisation and a working knowledge of the local stone.