The river Deel rises high in the Nephin Beg mountains and flows for forty five kilometers through moorland and pastures, and through the town of Crossmolina, before entering the northern end of Lough Conn. It is the largest of the Moy tributaries and offers a wide variety of angling experiences ranging from dry fly fishing for trout together with spring salmon Fishing, in the lower reaches, to lively brown trout and grilse fishing in the remote upper reaches,
The majority of spring salmon used to be caught downstream of Deel Castle on spinner and worm but this area is closed in sprong as a cpnservation measure (see below). The grilse fishing begins in late May or early June and peaks around the first week in July.
Use of prawn and/or shrimp for salmon angling on the River Deel is prohibited in the entire River Deel, throughout the season.