One of the most historically significant bays on the entire lake. It contains the fortified island of Illauncarbery, previously known as Macamh Iniscreawa according to Wilde. The fortress is a massive circular structure with 6ft thick walls that stand 10ft high. It is well over a thousand years old, and is of the same era as the Carrowmoreknock Boat with its Viking Axes found nearby. The Island lies in front of Cargin Castle.

The bay supports some wonderful trout fishing from the banks, and contains a difficult to get to, but largely sheltered anchorage.