Overview
Lough Corrib lies north of Galway City and extends into County Mayo. It covers around 176 km² between the city and the Connemara foothills, and runs about 43.5 km at its longest. If you do one thing here, do it from the water: the scale of the place only lands once you’re out on it. Local placename lore traces Loch Coirib to Loch Oirbsen, a name linked to the sea god Manannán mac Lir, fitting for a lake that behaves like an inland sea.
The human history runs deep. A 12th-century channel known as the Friar’s Cut let boats pass from the lake down to the sea at Galway.
Islands & Heritage
Tradition holds that Lough Corrib has an island for each day of the year, though there are many more than that. Inchagoill is a heavily wooded island between Cong and Oughterard, with two early church ruins, one attributed to Saint Patrick and the other a 12th-century ‘saints’ church, an old graveyard, and the rudder-shaped Lugnaedon Stone, said to mark the grave of Saint Patrick’s nephew.
Another landmark is Hen’s Castle (Castlekirk), a tower house on a half-acre rock. By tradition it is tied to Gráinne Ní Mháille (Grace O’Malley), the 16th-century sea captain and chieftain, who is said to have held it after her husband’s death. It is best seen from the water, where the scale of the islands against the Maumturk mountains comes home.
Wildlife & Nature
Lough Corrib is a Special Area of Conservation, and its shallow southern basin supports beds of stoneworts, aquatic plants that are part of the protected lake habitat. The lake splits into a shallow, limestone-rich southern basin and a deeper northern basin, joined by a narrow channel. The clear, marl-rich southern water grows dense beds of charophytes (stoneworts), which feed and shelter wildfowl.
Mammals include otters, mink, stoats and several bat species that roost in the shoreline woods. Spring brings a heavy dawn chorus of migratory birds. The SAC boundary reaches beyond the waterline to take in adjacent callows, grasslands and raised bogs.
Visiting the lake
Corrib Cruises lists trips that stop at Inchagoill, where two historic church ruins stand. Check your sailing date, departure pier, return and boarding arrangements with the operator. Cruises are best booked ahead, and sailings and facilities vary with the season.
Without a boat, you can follow the shoreline by road from Galway City, heading north past Annaghdown, Headford and Cong. Annaghdown, with its ruined castle and priory on the water’s edge, is a worthwhile stop. If exploring by land, use signed public shore access and keep private or working quays clear.
Fishing
Inland Fisheries Ireland describes brown trout and salmon fishing on the Corrib. A State licence is required to fish for salmon. Check the current regulations for your date and species and check whether local permission or a separate permit is needed for your section. Rules can differ between the lake and tributaries.
Because of submerged rocks, variable depths and strong currents in some channels, first-time anglers are well advised to hire a local guide.
Safety on the water
Corrib is big and its weather turns fast, especially in spring and autumn. Wear a lifejacket, watch the forecast, carry a means of calling for help, and tell someone ashore your route before you head out. Check public transport timetables before relying on a bus out of Galway.
Environmental Stewardship
Invasive curly-leaved waterweed (Lagarosiphon major) and zebra mussels both threaten the native fish and the water quality. The single most useful thing a visitor can do is simple: clean, dry and check your boots, waders and boat before moving them from one water to the next, so you’re not the one who carries the next invasive in.