Connemara lies in the territory of , West Connacht, within the portion of County Galway west of Lough Corrib, and was traditionally divided into North Connemara and South Connemara. The mountains of the Twelve Bens and the Owenglin River, which flows into the sea at / Clifden, marked the boundary between the two parts. Connemara is bounded on the west, south and north by the Atlantic Ocean. In at least some definitions, Connemara's land boundary with the rest of County Galway is marked by the Invermore River otherwise known as (which flows into the north of Kilkieran Bay), Loch Oorid (which lies a few kilometres west of Maam Cross) and the western spine of the Maumturks mountains. In the north of the mountains, the boundary meets the sea at Killary, a few kilometres west of Leenaun.