Lough Formal Walk: Carrigan Forest is part of the Marble Arch Caves Global Geopark. The Lough Formal walk is almost all on forestry tracks and features a short path through the heather to the summit of Formal More. This brisk walk is a chance to fill your lungs with mountain forest air while enjoying the views from Formal More, looking at some features of geological interest and experiencing a touch of wilderness. Sitting quietly for a while, you may be surprised at how much wildlife comes to you, in this seemingly barren woodland.