<p>The Mourne and Cooley Mountains are quite simply a hiker's paradise.<br>The highest and most dramatic mountain range in Northern Ireland, the Mournes hug the County Down coastline in a compact region designated as an Area of Outstanding Natural Beauty. The Cooley Peninsula ? a finger of land in County Louth bounded in the north by the spectacular Carlingford Lough ? is one of Ireland's best kept secrets.<br>These exhilarating walks will take y...