Wood Island is located on St. John’s Lough on the Shannon-Erne waterway outside Ballinamore.

St. John’s Lough is a shallow freshwater lake 4 kilometres west of Ballinamore,[2] covering a surface area somewhere between 1.46 km2

Saint John’s Lough extends from Ballyduff Bridge in the north-east, before dividing into three broad reaches separated by narrow passes, or straits.

The “Derrymacoffin Pass” connects the Ballinamore canal and northern lake portion to the central John’s lough, and the “Muckross Pass” connects the central lough to the southern lough.