The Owenmore River in County Mayo is a classic and rugged Atlantic salmon and sea trout fishery, draining a vast area of blanket bogs, moorland, and mountains in northwest Mayo. It is a substantial spate river, characterized by its peat-stained, tea-coloured water that responds quickly to rainfall. The river system, which includes the interconnected Owenduff River and their tributaries, flows through the wild terrain of the Owenduff/Nephin Complex SAC and Ballycroy National Park before entering the Atlantic near Blacksod Bay. This creates a remote, visually dramatic, and ecologically significant fishing environment where success is closely tied to water levels and weather conditions.