Upper Lough Erne is a remarkable and complex fishery straddling the border counties of Cavan and Fermanagh in Ireland, offering a diverse range of angling opportunities across a labyrinthine network of channels, islands, and vast reed beds. The lake is a maze of interconnected waterways set within one of the most ecologically rich landscapes in Northern Ireland, with extensive alluvial forests lining its shores and mature oak woodlands on the drier soils to the south. This intricate geography creates an abundance of habitat types — from shallow, weedy bays to deeper river sections and open water — making it an exceptional destination for coarse anglers in particular. Fishing on Upper Lough Erne is largely free, accessible by both boat and shore, and productive throughout the year with no closed season for coarse species.