To the north of Letterbreckaun is the subsidiary summit of Letterbreckaun NE Top , whose prominence of qualifies it as an Arderin Beg. Further north, the slopes of Letterbreckaun drop into the sharp and steep v-shaped col of Maam Turk (, meaning pass of the boar), from which the entire range bears its name. Paul Tempan notes that the holy well marked on the OS maps at Maam Turk was noted by Irish historian Ruaidhrí Ó Flaithbheartaigh in 1684, saying: There is a well in memorie of St. Fechin at Mam-tuirk. Further north from the col of Maam Turk is the minor peak of Maumturkmore, which then crosses the Col of Despondency to the grassy sandstone and siltstone massif of Leenaun Hill.