Book excerpt: The Mourne and Cooley Mountains are quite simply a hiker's paradise. 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. These exhilarating walks will take you to the highest point in Northern Ireland. Trek through the picturesque woodland trails of Castlewellan and Tollymore. Discover the highest passage tomb in Ireland. Walk along an old smuggler's route, tranquil reservoirs and the sand-dunes of Murlough Nature Reserve. The more ambitious will relish the Mourne Wall challenge, and some summits include optional scrambles to the top of dramatic granite tors or rocky outcrops. Each graded route is illustrated with photographs and specially drawn maps. Snippets on the rich flora, fauna, geology, history, heritage and folklore of each area are included throughout. So, get your walking boots on and discover the impressive landscape that spawned the legend of the Táin Bó Cúailnge and inspired C. S. Lewis' magical world of Narnia .