Located just 500 metres from Fennor church and 625 metres from its castle, this heavily overgrown earthwork consists of a raised circular platform, approximately 22 to 30 metres in diameter, surrounded by an elaborate system of defensive features. The entire structure spans roughly 100 metres from northwest to southeast, making it a substantial presence in the local countryside.

The monument’s defences are particularly noteworthy, comprising multiple rings of banks and ditches that would have made any approach difficult. The central platform, now covered in bushes and trees, is defined by a steep scarp rising 4 to 5 metres high. Beyond this lies a fosse, or defensive ditch, measuring 8 metres wide at the top and narrowing to 3 metres at its base. A substantial earth and stone bank follows, flat-topped and measuring 6 metres wide at its crown, with evidence of stone revetment along its inner face in the eastern section. This middle bank stands level with the central platform and rises higher than the outer defences, which consist of another fosse and an outer bank stretching 10 metres wide at its base.

Archaeological evidence suggests this may actually be a trivallate earthwork, with possible stone wall footings visible around the platform’s eastern perimeter adding a third line of defence. Whilst quarrying has damaged the northwest section and modern farming has created a cattle gap on the east-northeast side, the monument remains remarkably intact. When the antiquarian Healy visited in the late 19th century, he described it as a ‘beautiful rath near Fennor Church some 45 yards in diameter, surrounded with fosse, rampart and parapet’, testament to its enduring presence in the Tipperary landscape.