Belmore Mountain (from Irish: Sliabh Bhéal Mór, meaning 'big mouth mountain') is a hill in the townland of , western County Fermanagh, Northern Ireland. With a summit roughly 398 metres (1,306 ft) above sea level, it is the second highest point in Fermanagh, the highest being at Cuilcagh on the Northern Ireland–Republic of Ireland border in the south of the county. The historian John O Donovan (1834) states that the indigenous population called the mountain Bel Mor Muintir Pheodachain .