|County Laois, County Offaly|
|Range:||Slieve Bloom Mountains|
|Summit:|| 1,729 feet S23259890 |
Arderin is a mountain on the border between the counties of Laois and Offaly. With a height of 1,729 feet it is the highest point in the Slieve Bloom Mountains and also the highest point of both County Laois and County Offaly.
The Irish language name is Ard Éireann, meaning "Ireland's Height".
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