Lough Arrow, County Sligo, is one of the great Irish trout fishing loughs. It lies 24km south-east of Sligo town and 6.5km north-west of Boyle, Co. Roscommon.
Lough Arrow is a limestone lough, incredibly rich and, while it has some feeder streams, it is mainly spring fed. The trout average 1½lb and fish to 6lb and 7lb are taken on fly annually.
There is good public access around the shore, the principal access points are Brick Pier, Ballinafad Pier and Rinnbawn Pier. The duckfly hatches in late March and early April and the olives begin hatching around mid April and last until mid May. The mayfly season generally begins about 17 May and lasts until the second week of June. The spent gnat fishing is one of the great attractions of Lough Arrow and the fishing here is free.