Lough Foyle, sometimes Loch Foyle (from Irish: Loch Feabhail, meaning Lough of Feabhal), is the estuary of the River Foyle in Ulster. It starts where the Foyle leaves Derry. It separates the Inishowen Peninsula in County Donegal, Republic of Ireland from County Londonderry in Northern Ireland.
Open Water Swimming
Mercedes Gleitze swam here in 1929.