The highest mountain peak in the district is Slieve Foy in the town-land of Ballyonan. Its height is one thousand and twenty feet. It acts as a weather guide in fore-telling the rainfall of Omeath. The period during which the Peak is obscured by clouds is referred to as “a cap on Slieve Foy.” This invariably followed by rainfall lasting three or four days. This fact gives rise to the correct meaning of the word Fathaigh that is Giants mountain, due to some connection which Fionn Mac Cumhail is said to have had with the mountain, but, when the mountain foretells rainfall “Faídh” meaning Prophetic Mountain seems the more probable corrected form.