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Home » Trout fly fishing » Shannon Region »

Lough O'Flynn, Co. Roscommon

OPEN SEASON: March 1st - October 12th

Lough O'Flynn is a 300 acre rich limestone lake located in Co Roscommon just north of Ballinlough village. There are good stocks of wild and stocked brown trout averaging about 1.5 lbs with fish to 3 to 4lbs sometimes caught. Lough O'Flynn is renowned for its prolific hatches of Mayfly and some very good fishing can be had from mid May to early or sometimes mid July on dry patterns such as Green Drake, Spent Gnat and a variety of Wulffs. The Mayfly season often runs well beyond the early part of June. Later in the season from mid June onwards the sedge season in an important period. In August and September anglers dapping a Daddy Long Legs and grasshopper can get good results.

Traditional wet flies work well on O'Flynn. These include Sooty Olive, Golden Olive, Claret and Mallard, Dabblers, Watson's Fancy, Dunkeld just to mention a few.

icon Lough O’Flynn & Upper Suck Valley Angling Guide (2.99 MB, .pdf)

Angling regulations


10 inches


6 trout


Artificial fly and spinning only, boat and shore fishing.


This fishery is part of Inland Fisheries Ireland's 'Midland Fisheries Group' of managed waters and anglers require a fishing permit (ticket charge) to fish here.

Permits can also be purchased from the following outlets - please click this link.


Other Useful information


There is good public access to the lake on the southern shore with a boat harbour and pier and spacious car park. This is situated across from the Ballinlough Railway Station about 1 mile from Ballinlough Village. Nearest villages and towns - Ballinlough (1.6 kms), Castlerea (10 kms), Boyle (29 kms), Roscommon (40 kms). Tuam (34 kms), Ballyhaunis (10 kms).


Guides and Instructors in the Shannon Region

Tackle shops in the Shannon Region