Overview
Sheephaven Bay is a broad, shallow inlet on the north coast of County Donegal, bounded by the Rosguill Peninsula to the east and Horn Head to the west. Those two arms keep the worst of the Atlantic off the water, which is why the bay once supported a large herring fleet. The name has drifted about: the Irish Cuan na gCaorach (‘haven of the sheep’) looks to be a modern translation, older maps record ‘Ship Haven’, and an earlier name again was Cuan na gCurrach, the bay of the currachs. Around its shore sit Carrigart, Creeslough, Downings, Dunfanaghy, Marble Hill and Portnablagh.
Doe Castle
The bay’s landmark is Doe Castle, a tower house on the waterline near Creeslough and the stronghold of the MacSweeneys (Clann Suibhne), who held it for roughly two centuries from the 1420s. Chief Eoghan Óg II sheltered survivors of the 1588 Spanish Armada within its walls, and the last chief, Maolmhuire an Bhata Bhui, marched out with Red Hugh O’Donnell to the Battle of Kinsale in 1601. Inside the keep is a finely carved MacSweeney grave-slab from 1544.
Admission to the grounds is free and they’re open daily year-round, but there’s no OPW visitor centre here and the keep is not open for casual viewing. Guided tours of the keep are by appointment only – email doecastlecreeslough@outlook.com, with 48 hours’ notice for cancellations. There’s a free car park on site; bring your own coffee, as there are no refreshments at the castle. It’s an easy stop on the R245 between Carrigart and Creeslough.
Beaches and coastal walks
The shore mixes sheltered swimming strands with rugged coves. Murder Hole Beach draws people for its steep cliffs and golden sand, reached on foot across the dunes; go at low tide for the rock pools, arrive early because parking is tight, and treat the water with respect – this is an unguarded Atlantic beach, not a lido.
Further east, Marble Hill and Downings are the family beaches. Marble Hill is a long dune-backed arc good for swimming and sailing, with a seasonal café behind it; Downings faces into the calmer inner bay, which suits younger swimmers. Both have public toilets and seasonal facilities in summer.
On the water
The sheltered inner bay is well suited to kayaking and paddle-boarding, with the surf coming into the more exposed strands in winter when north-westerly swells run. For sailors, the recognised anchorages are Downies Bay on the eastern shore, Ards Bay under the southern head, and Marble Hill and Dunfanaghy bays to the west; the bay is exposed to winds from the north and north-east, so shelter shifts with the forecast. Local diving operators run introductory and guided trips – water temperatures sit around 10°C year-round, so a full wetsuit with hood, gloves and boots is not optional.
Wildlife
The shallow, nutrient-rich water pulls in gulls, terns and the odd puffin along the cliff edges. For the seabirds proper, cross to Horn Head: its 6 km loop passes prehistoric stone circles and Napoleonic-era coastal-defence points and a WWII lookout, and the cliffs hold breeding kittiwakes, razorbills and guillemots in spring. Guided boat tours from the bay run out to Duncan Head Cave and the puffin colony under Horn Head – the single best wildlife outing here. Ards Forest Park, about nine kilometres off, adds woodland and lake trails.
Practical information
Getting there – Drive north from Letterkenny on the N56, turn onto the R251 toward Dunfanaghy, then follow the R245 for Doe Castle. There’s free parking at the castle; beach parking is limited at Murder Hole and pay-and-display at Marble Hill and Downings in peak season.
A pint with a view – The Harbour Bar in Downings overlooks the bay and is the local pick for seafood and a well-poured pint after a day on the coast.
Tides – Rock-pool visibility and safe access at Murder Hole change sharply with the tide; check the Irish Marine Forecast or local tide tables before you set out.