Overview
Mulroy Bay (Irish: Cuan na Mhaoil Ruaidh) is a 12 km sea loch on Donegal’s north‑coast. Its narrow entrance opens onto a winding 10 km channel with three tight narrows only 100–150 m across, where currents can reach 3–5 knots. Beyond the channel lies the Broad Water, an 8 km shallow lough speckled with rocky islets. The bay’s name – “Bay of the Red Current” – reflects the reddish hue the water takes on in winter.
Settlements hugging the shoreline – Milford, Kerrykeel and Cranford – offer traditional pubs, craft shops and welcoming accommodation. Rolling hills, sandy beaches and dense woodlands surround the water, making the area a micro‑cosm of Donegal’s wild beauty.
Tucked within the sheltered waters is Red Island (Irish: Oilean Ruaidh), a low‑lying speck that turns a deep russet in winter. Accessible via a tidal causeway, the island is a designated Discovery Point on the Wild Atlantic Way and a thriving nesting site for seabirds.
History & Background
The Irish name Cuan na Mhaoil Ruaidh points to a long maritime heritage. Historically the bay was a vital route for fishing and trade, with villages growing around small harbours and forges. Folklore speaks of the “Red Stream” and of old forge sites that dot the landscape.
Red Island’s earliest recorded name was Oilean na Bbhreighe – “Island of the Prisoners” – hinting at a possible historic refuge or confinement. In the 19th century English‑language surveyors renamed it “Island Roy”, a phonetic rendering of Oilean Ruaidh. Today the modern Irish name reflects the striking winter colour of its vegetation.
What to See & Do
Mulroy Drive – the scenic loop
The 35 km Mulroy Drive loops from Milford, linking the Atlantic Drive, Fanad Lighthouse, Portsalon beaches and the Knockalla Coast. New viewing points, funded by Fáilte Ireland, frame sweeping sea‑inlet panoramas and hidden coves – perfect for photography and picnics.
Outdoor pursuits on the mainland
- Walking & Hiking – Trails such as the 7 km Colmcille Trail and the 1.5 km Woodquarter Forest Trail wind through woodlands, along the water’s edge and past a 17th‑century church.
- Cycling – The gentle gradients of Mulroy Drive suit families and seasoned road cyclists alike.
- Water sports – Kayaking (including full‑moon tours) with Eco Atlantic Adventures, canoeing, paddle‑boarding and deep‑sea fishing launch from Woodquarter and other points.
- Diving – Mevagh Dive Centre, a 5‑star PADI facility, offers heated indoor pools and guided dives on local wrecks as shallow as 10 m.
- Mountain biking & Horse riding – Rougher tracks near Kerrykeel cater to mountain bikers, while Ashtree Riding Stables provide guided rides across the hills.
- Stargazing – Low light pollution around Kerrykeel makes the bay an excellent spot for night‑sky observation.
Red Island (Island Roy)
- Bird‑watching & wildlife – The island’s cliffs and scrub host nesting gulls, terns and occasional puffins in summer. Otters and seals are often seen in the surrounding waters.
- Walking and scenery – A short, well‑marked path circles the island, offering uninterrupted views across Mulroy Bay toward the rugged Donegal coastline. The gentle walk suits families, and the contrast of red‑tinged vegetation against deep‑blue water is a photographer’s delight, especially at sunrise and sunset.
- Discovery Point – Signage at the causeway entrance provides a brief overview, and a QR‑code links to an audio guide narrating the island’s natural and cultural story.
Practical Information
- Access – Red Island is reached via a tidal causeway that connects to the mainland near Carrigart (also described as a low‑tide crossing from the mainland). The road is passable except at high tide; visitors should consult local tide tables, available at Carrigart harbour office or online via Met Éireann, to plan a safe crossing.
- Facilities – The mainland villages provide parking, public toilets, cafés and accommodation ranging from B&Bs to self‑catering cottages. No permanent facilities exist on the island, so bring water and snacks.
- Safety – Wear sturdy footwear for the island’s uneven path and be prepared for sudden changes in weather. Kayakers and divers should check local marine forecasts before heading out.
- Seasonality – The bay’s red‑tinged waters and island vegetation are most striking in winter, while bird‑watching peaks in the summer months.
- Nearby parking – Free car parks are available in Milford and Carrigart, both within a short walk to the Mulroy Drive trailhead and the Red Island causeway.
Tide & Weather
Mulroy Bay’s currents can be swift, especially through the three narrow narrows where speeds reach 3–5 knots. Tides change quickly; the causeway to Red Island is submerged for several hours around high tide. Check the latest tide tables on the Met Éireann website or at the Carrigart harbour office before setting out.
Weather on the Donegal coast can shift rapidly. Even in summer, strong winds and rain are common. Pack waterproof clothing, layers, and a wind‑proof jacket. For the best views, aim for early morning or late afternoon when the light is softer and the sea is calmer.
Nearby attractions
- Ballymastocker Bay (/ballymastocker-bay/) – A Blue Flag beach renowned for its white sand and clear waters, just a short drive north of Mulroy Bay. Ideal for swimming, surfing and coastal walks.
- Bloody Foreland (/bloody-foreland/) – The dramatic cliffs of Bloody Foreland lie east of the bay, offering spectacular sea‑stack views and a rugged hiking trail.
- Broad Water – Already mentioned, the shallow lough is popular for kayaking and bird‑watching, especially for winter waterfowl.
Enjoy the blend of dramatic sea‑lochs, historic villages and the quiet charm of Red Island – a perfect slice of Donegal’s coastal heritage.