Sliabh Beagh, or Slieve Beagh in its anglicised form, is an upland area which straddles the border between Northern Ireland and the Republic of Ireland. Spread across the counties of Tyrone, Fermanagh and Monaghan this area has a number of designations including Special Area of Conservation (SAC), Special Protection Area (SPA), Area of Special Scientific Interest (ASSI) and Natural Heritage Area (NHA).