The Sperrins or Sperrin Mountains (from Irish Speirín 'little pinnacle') are a range of mountains in Northern Ireland and one of the largest upland areas in Northern Ireland. The range stretches from Strabane eastwards to Slieve Gallion in Desertmartin and north towards Limavady, in the counties of Tyrone and Londonderry. The region has a population of some 150,000 and is a designated Area of Outstanding Natural Beauty.