Arigna Mountains Special Area of Conservation Adventures

The Arigna Mountains Special Area of Conservation (SAC) encompasses a sweeping upland region straddling counties Leitrim and Roscommon in the west-central part of Ireland. Characterized by steep slopes and rounded summits, the Arigna Mountains rise to just under 500 meters in elevation and are composed primarily of sandstone and shales. This SAC is designated under the EU Habitats Directive in recognition of its important blanket bog habitats and wet heathland, which support a range of rare and protected flora and fauna. The blanket bog systems in particular are a prime example of intact, actively growing peatlands with diverse vascular plants, lichens, and bryophytes. Bird species such as the hen harrier and red grouse utilize this upland terrain, making it an important site for ornithologists and wildlife observers.

Historically, the Arigna Mountains area is famously linked to Ireland’s coal mining past, with underground mines operating for over 400 years until closure in the late 20th century. Mining heritage trails and local museums tell the story of the Arigna Mines, adding cultural and historical interest for visitors. Outdoor recreation opportunities center on hillwalking, trail running, and nature watching, with several informal routes accessing the wild moorlands, heaths, and upland lakes. The SAC’s remote and unspoiled character appeals to those seeking peaceful, rugged upland experiences, especially photographers and naturalists. The area’s remoteness and relatively low visitor numbers preserve a sense of wilderness while offering vital habitat protection in a landscape increasingly impacted by development and intensive farming elsewhere.