Slemish Mountain Summit
The distinctive plug of an extinct volcano rising abruptly from the flat Antrim plateau, Slemish is where the teenage St Patrick is said to have herded pigs as a slave in the 5th century. The summit scramble is short but genuinely steep, and the 360-degree panorama from the top — taking in the whole of County Antrim from the Sperrins to the sea — is one of the finest viewpoints in Northern Ireland
The Climb
The ascent from the car park at the base takes roughly 30–40 minutes and gains about 250 metres in a short horizontal distance, which means it is steep enough to require hands on rock near the top. The path is well-worn but rough, and the final section is a proper scramble over basalt columns — thrilling rather than dangerous for anyone reasonably fit.
On a clear day the summit cairn reveals a staggering spread of landscape: the flat farmland of mid-Antrim stretching in every direction, the blue line of the North Channel to the east, and on exceptional days the faint outline of Scotland beyond it.
Pilgrimage and Culture
On St Patrick's Day (17 March) Slemish draws thousands of pilgrims who make the climb as an act of devotion — a vivid and moving spectacle that has been happening continuously for centuries. If you visit on that date, expect company on the trail.
The mountain sits within a wider Area of Outstanding Natural Beauty and the farmland at its foot is classic Antrim drumlin country, worth a slow drive around before or after your climb. The nearby village of Broughshane, just 5 km away, is famously well-kept and has won Ulster in Bloom awards repeatedly.
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