The Foyle and its tributaries covering 3670sq.km and spanning the counties of Donegal, Derry and Tyrone, hide fishing's best kept secret. Each year tens of thousands of salmon, grilse and sea trout run the waters of the Foyle System, making it one of therichest fishing rivers in Europe and one of the best salmon waters in the world. Game fishing opportunities exist through local angling clubs or through other private/government interests.