Diamond Hill or Bengooria (Irish: Binn Ghuaire, meaning 'Guaire's peak') is an isolated peak overlooking the village of Letterfrack, in the northwest corner of the Twelve Bens in Connemara National Park in County Galway, Ireland. At only 442 metres (1,450 ft), it does not rank as an Arderin, or a Vandeleur-Lynam; however, it has the prominence to rank as a Marilyn. Diamond Hill lies just west of Knockbrack and the small massif of Benbrack, and looks into the Polladirk valley, around which several major Bens are located. Despite its moderate size and isolation, compared to the nearby Twelve Bens, Diamond Hill is a popular peak due to its paths and boarded mountain trail, and relative ease of access, together with views of the core Twelve Bens range, and western Connemara.