Northern Ireland
Coolnasillagh Mountain
423M
1388FT
About Coolnasillagh Mountain
Rising above the Glenshane Pass in County Londonderry, this sprawling Tump forms part of the eastern Sperrins. Its broad, heather-clad slopes are designated as an Area of Special Scientific Interest, preserving a significant expanse of blanket bog. Walkers reaching the summit are rewarded with clear views across the Moyola Valley toward Slieve Gallion.
Key Statistics
Rank
37th Highest in Region
Parent Range
Data coming soon
Prominence
?
52m
Nearest Town
Data coming soon
Geology
Geological data pending update.
Classifications
Find It
OS Grid Reference
C775007
Latitude
54.8481°N
Longitude
6.7943°W
Did You Know?
- •The name derives from the Irish 'Cúil na Saileach', which translates as 'corner of the willows'. This likely refers to a sheltered nook at the base of the hill where willow trees flourished in the damp Sperrin soil.
- •It is designated as an Area of Special Scientific Interest (ASSI) due to its high-quality upland blanket bog and wet heath, habitats that support breeding populations of red grouse and golden plover.
- •From the summit, the view extends west toward Sawel Mountain, the highest peak in the Sperrins, while Lough Neagh is often visible to the southeast on clear days.
- •Navigating the summit plateau often involves more bog-hopping than actual walking, making it an excellent place to test exactly how waterproof your boots claim to be.