|Magairlí an Deamhain/Binn Gharbh|
|Elevation||645 m (2,116 ft)|
|Prominence||280 m (920 ft)|
|Location||Border of County Galway and Mayo, Republic of Ireland|
|Parent range||Partry Mountains|
|Topo map||OSi Discovery 37|
Devilsmother is a 645-metre-high (2,116 ft) mountain in Connemara, Ireland. Devilsmother is in the Partry Mountains, at the head of Killary Harbour, overlooking the Western Way long-distance path. It sits on the border between County Galway (to the south) and County Mayo (to the north).
The mountain has two Irish language names: Magairlí an Deamhain (meaning "the demon's testicles") and Binn Gharbh (meaning "rough peak"). The anglicized spellings Mogarlyandoon and Ben Garrif appear on some historical maps. Originally, it seems that Magairlí an Deamhain was the knobbly end of the mountain's northern ridge, while Binn Gharbh was the mountain as a whole. The English name Devilsmother may be "a euphemistic false translation" or may be based on an alternative name.