Slieve Gallion, Mountain peak in County Londonderry, Northern Ireland.
The easternmost summit of the Sperrin Mountains rises to 528 meters, featuring steep slopes that lead to a flat granite-composed top near Lough Neagh.
The Book of Armagh from the 7th century refers to this mountain as Collunt Patricii, which translates to the height of Saint Patrick.
The mountain held significance during medieval times as a gathering place for the festival of Lughnasadh, continuing through the 20th century.
The summit contains a transmitter station at 496 meters elevation, accessible through a small road from Moneymore, located 6.4 kilometers away.
Local folklore tells of a giant named Callann Mór buried at Carnanbane on the western slopes, giving the mountain its name Sliabh gCallann.
Location: County Londonderry
Elevation above the sea: 528 m
GPS coordinates: 54.73181,-6.76127
Latest update: April 3, 2025 12:24
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