The River Robe is a wild brown trout fishery winding through the limestone heartland of County Mayo in the west of Ireland. Rising approximately 3 miles outside the town of Ballyhaunis, the river travels some 40 miles before emptying into the renowned Lough Mask, making it the largest tributary of that lake system. The river flows through the town of Ballinrobe — a name derived from the river itself — and passes through some of the most fertile limestone country in Connacht. That limestone bedrock is the defining characteristic of the Robe, giving the water exceptional fertility and supporting a rich food chain that produces impressively sized resident brown trout. The river is largely free to fish, with no permit required on the state-owned sections, making it an accessible and rewarding destination for visiting anglers.