Plizio Visual Lab

Nephin

Plizio editorial teamUpdated: Jun 2026Data Sources

peak

Weather…

Nephin is an imposing, isolated mountain in County Mayo in western Ireland, reaching an elevation of 806 metres. It is the second-highest peak in the province of Connacht and forms the prominent eastern terminus of the Nephin Beg range. Geologically, the mountain is primarily composed of hard quartzite, which gives it its characteristic conical shape and pale, rocky slopes. Nephin dominates the landscape surrounding Lough Conn and is visible from a great distance. It is part of the Wild Nephin National Park, one of Ireland's largest wilderness areas, known for its pristine blanket bogs and dark night skies. The ascent to the summit is challenging and features, in clear weather, spectacular views extending to the Atlantic Ocean and the holy mountain of Croagh Patrick. Ecologically, the region is a vital habitat for rare mosses and lichens, as well as birds of prey. In Irish mythology and folklore, the mountain is frequently mentioned and served for centuries as a landmark for travellers in the rugged Mayo wilderness.

Location: Ireland
Top sights: Inishcoe Castle · Rathleenan · Rathnaboogh
Nearby: Swinford (20 km)

Best time to visit & climate

The most pleasant time to visit is Jun–Aug.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg °C	6	5	6	8	11	13	14	14	13	10	8	6
Rain mm	129	100	94	76	92	97	112	118	103	122	136	136

📋 Practical info

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Getting there

Access to Nephin is typically via local rural roads near County Mayo. A physical map is highly recommended as exact starting points for this area vary greatly.

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Best season

The best season to visit is typically from late spring to early autumn, offering longer daylight hours. Winter brings harsh weather and poor visibility.

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Terrain & paths

Expect rough, uneven terrain and open moorland typical for the region. Navigation skills are essential, as clear and marked trails are often non-existent.

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What to bring

Waterproof hiking boots are necessary for the boggy ground. Always pack warm, layered clothing, a reliable map, compass, and sufficient food and water.

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Parking

Parking is generally informal along quiet country roads or small lay-bys. Visitors should ensure they never block local traffic or agricultural entrances.

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Safety

Weather conditions in the mountains can change rapidly. Always check the local forecast before departing and inform someone of your planned hiking route.

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Time needed

A typical visit to explore the higher elevations takes around three to five hours. Always allow extra time for navigating pathless sections safely here.