The Sillees River (Irish: Abhainn na Sailchis meaning "the sally kesh river") is located in south-western County Fermanagh.
From here it continues through Correl Glen, Derrygonnelly and the Boho countryside, passing through both Carran and Ross Loughs where it ends in Lower Lough Erne.
[1][2]There are a few tributary streams and rivers that flow into the Sillees river, amongst them the Boho River, the Screenagh, which emerges from the Arch cave, and the Reyfad Stream, which enters Pollytullybrack of the Reyfad cave system.
[3] The river is famous for the curse which was given by St Faber, when she changed its direction, making the river bad for fishing and good for drowning.
[4] In another tale of the river, there is a highwayman known as Black Francis Corrigan, who leaps the Sillees in a single bound with his horse after a famous robbery.