The particular stone recorded here, rectangular in section and oriented north to south, measures roughly 1.38 metres in height. It is one of dozens spread across two adjoining townlands, and the sheer density of the grouping sets it apart from the isolated prehistoric megaliths found elsewhere in Ireland.

When the Inspector of National Monuments surveyed the area in 1934 to 1936, he counted 221 stones still standing, 173 in the townland of Timoney Hills and 48 in the neighbouring townland of Cullaun. He described them as "a most remarkable group," noting that they appeared to follow no particular arrangement, with the exception of one stone circle in Cullaun. All were of red sandstone or conglomerate, and ranged from roughly 0.9 to 1.8 metres above the ground. A later survey published in the Archaeological Survey of Ikerrin by Stout in 1984 mapped 245 stones in total, but recorded that 70 had already been removed, along with five cairns that have since vanished entirely. That gradual attrition gives the site a melancholy quality; what survives is itself a reduced version of something once considerably larger.

The unresolved question hanging over Timoney Hills is whether these stones are genuinely prehistoric or something else altogether. Their location within the landscaped grounds of Timoney Park, the estate of the Parker-Hutchinson family, has led to scepticism about their antiquity. Estate owners in the eighteenth and nineteenth centuries sometimes arranged or relocated stones as ornamental features within designed landscapes, and the lack of any clear astronomical or ceremonial arrangement here has done little to settle the debate. The stones are protected as National Monument No. 353, which preserves what remains, even if the deeper question of their origin continues to resist a clean answer.