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The River Duff, which is also known as Bunduff, flows for 14 miles from the Glenade valley in County Leitrim to the sea. This river is a prolific spate river and gets a good run of summer salmon and grilse.
The River Duff is located 14 miles from the Glenade Valley in to Donegal Bay, just north of Mullaghmore. It is then joined by the Ballanaghtrillick River, which runs out of the Horseshoe Pass. This is a prolific spate river for salmon with a good run of summer salmon and grilse. The fish start to enter the river at the beginning of April, with the peak of the salmon run coming in July and August.
The Duff is a spate river that can fish very well given the right conditions, especially after a freshet.
Most anglers choose the deep pool below the falls close to the sea and consequently this pool can become overcrowded. Once a flood has let fish run the falls there is some good fishing available above the falls and also some good water upstream of the main road.