Lissagriffin Lakes

Overview

Lissagriffin Lakes are a pair of shallow, brackish water bodies that sit on a low‑lying causeway just east of Barleycove beach on the Mizen Peninsula, County Cork. The causeway carries the road that links the popular sandy dunes of Barleycove with the dramatic cliffs of Mizen Head, making the lakes an inevitable visual pause for anyone touring the Wild Atlantic Way. The water is fed by a network of small streams and the occasional tide‑influenced surge, creating a mosaic of reed‑fringed margins that attract a surprising diversity of birds.

History & Background

Although the lakes themselves are a relatively recent feature in the geological record, the surrounding landscape is steeped in medieval history. To the west‑south‑west of the lakes lies the site of an O’Mahony castle, once part of a network of fortifications that guarded the south‑west Cork coastline. Historical records from Lewis’s 1837 topographical dictionary mention “some remains of ancient castles” at Lissagriffin, but today no stonework survives above ground. Archaeologists suspect a souterrain – an underground passage typical of early medieval Ireland – may still lie beneath the cultivated fields, hinting at a settlement that predates the O’Mahony stronghold.

The causeway that now bisects the lakes was originally built in the eighteenth century as a “bog road” to transport butter from the interior to the Cork Butter Exchange for export. Modern visitors travel the same route, but now the road offers panoramic views of Dunmanus Bay, Sheep’s Head, and, on clear days, the distant Beara Peninsula.

What to See & Do

Birdwatching paradise

Lissagriffin is renowned among ornithologists for its nocturnal flight‑call recordings. A long‑term study by Irish Wildlife Sounds logged thousands of calls from a suite of species, many of which only pass through during migration. Highlights include:

These figures illustrate why the lakes are a magnet for birders in late summer and autumn. The reed beds and shallow margins provide roosting sites for sandpipers, plovers, and waders, while the open water attracts ducks, teal, and occasional gulls.

Walks and photography

A short, flat walk along the causeway offers uninterrupted views of the lakes’ reflective surface, the sand dunes of Barleycove, and the rugged cliffs beyond. Photographers love the sunrise over the water, when the sky’s pink hues are mirrored in the lake’s stillness. The route also passes the historic site of the lost O’Mahony castle, allowing a moment to imagine the medieval fort that once overlooked the same vista.

Seasonal highlights & practical tips

• Birding season – Late August to November is when migratory birds are most active; early mornings give the best chances to hear flight‑calls.
• Barleycove beach – Formed after the 1755 Lisbon tsunami, the beach is a Blue Flag site backed by a European Special Area of Conservation. Lifeguards are on duty during the summer months.
• Floating bridge (pontoon) – A seasonal pontoon bridge provides direct pedestrian access from the Barleycove car park to the lakes and beach. It is stored away in winter and may be closed for maintenance; check local notices before planning a walk.
• Parking – The main lay‑by at Barleycove offers free parking. In peak summer it can fill quickly, so arriving early is advisable.
• Accessibility – The causeway is a paved, level surface suitable for standard vehicles and wheelchair users, though the surrounding reed beds are natural terrain and may be uneven.

Nearby attractions

The lakes are a convenient waypoint for several other Mizen Peninsula highlights:

• Barleycove Beach – a wide, sandy beach backed by protected dunes formed after the 1755 Lisbon earthquake. It is a family‑friendly spot for swimming and water sports.
• Mizen Head Visitor Centre – home to the iconic Irish Light Signal Station (1905) and the famous arched bridge that links the island to the mainland.
• Three Castle Head – a cluster of three 15th‑century tower houses perched beside a cliff‑top lake; access is currently restricted due to structural instability, but the view from the road is impressive.
• Dunmanus Castle – an O’Mahony stronghold a few kilometres north, perched above Dunmanus Bay.
• Brow Head – the southernmost point of mainland Ireland, offering scenic walks and the historic Brow Head Signal Tower (1804).
• Altar Dolmen & Altar Church – near the road to Toormore, a neolithic dolmen and a 19th‑century famine‑relief church sit side‑by‑side; a Bronze‑Age wedge tomb was also discovered in the church grounds.

Practical Information

Lissagriffin Lakes are freely accessible from the public road; there is no admission fee or ticket office. Parking is available at the Barleycove lay‑by, which is a short walk to the causeway. The site is open year‑round, and the bird‑recording data show that the most active periods for wildlife are from late August through November, making autumn the prime season for birdwatchers.

For those wishing to explore further, the nearest public transport hub is Schull, where Bus Éireann services connect to Cork City. However, a rental car offers the greatest flexibility for navigating the narrow, scenic roads of the Mizen Ring.

Accessibility – The causeway is a paved, level surface suitable for standard vehicles and wheelchair users, though the surrounding reed beds are natural terrain and may be uneven.

Contact & Further Reading

• Historical details on the castle site: IrishHistory.com – Site of Castle, Lissagriffin
• Bird‑call recordings and species data: Irish Wildlife Sounds – Lissagriffin Part II
• General information on Barleycove and the causeway: Cork‑Guide – Barleycove

Getting there

From Cork City, follow the N71 west to Bantry, then take the R595 to Schull. From Schull, continue west on the R595; the causeway crossing the lakes appears shortly after the Barleycove turn‑off. GPS coordinates for the centre of the lakes are 51.47865619, ‑9.77824133.

Enjoy the quiet beauty of Lissagriffin Lakes – a place where history, geology, and avian life converge in a uniquely Irish setting.