Cnoc Lios Uachtair

Lissoughter or Lissoughter Hill (Irish: Cnoc Lios Uachtair, meaning 'hill of the upper ring-fort') is a prominent hill between the Twelve Bens and Maumturks mountain ranges, at the southern entrance to the Inagh Valley, in the Connemara National Park of County Galway, Ireland. With a height of 401 metres (1,316 ft), it does not qualify to be an Arderin or a Vandeleur-Lynam, however, its prominence of 336 metres (1,102 ft) ranks it as a Marilyn.

A quarry on Lissoughter's southern slopes (the Lissoughter-Derryclare quarry, named after the peak and the neighbouring Derryclare mountain), is a noted source of the green-coloured Connemara marble (sometimes called Connemara Lissoughter Marble). As an isolated standalone peak, it is less frequented by hill-walkers, however, it is regarded for its views of the two ranges and the southern boglands of Connemara.