- The Wicklow Mountains: These mountains are located in County Wicklow, just south of Dublin. They are the highest mountain range in Ireland, with the highest peak being Lugnaquilla at 925 metres.
- The Galtee Mountains: These mountains are located in Counties Tipperary and Cork. They are the second highest mountain range in Ireland, with the highest peak being Galtymore at 919 metres.
- The Macgillycuddy's Reeks: These mountains are located in County Kerry. They are the third highest mountain range in Ireland, with the highest peak being Carrauntoohil at 1,038 metres.