Arderin

Arderin is the highest point of Laois and Offaly counties in central Ireland, rising to 527 meters above sea level. The summit sits about 15 meters east-northeast of an ordnance survey marker within the Slieve Bloom mountain range.

The name Arderin comes from Irish language, meaning Ireland's Height, reflecting its geographical importance for the region. The mountain historically served as a landmark for people living in the surrounding valleys.

The term Arderin became the standard classification for Irish mountains exceeding 500 meters with a minimum prominence of 30 meters, creating a list of 408 peaks.

Navigation to the summit requires Discovery Map 54 to locate the peak precisely. Clear weather provides the best conditions for visiting, as the surrounding landscape becomes visible from this high vantage point.

With a prominence of 420 meters, this summit qualifies as a Marilyn in British and Irish mountain walking classifications. This distinction means it stands out clearly from other peaks in the region.