Lough Conn This Co. Mayo Lough in the North West of Ireland is approximately 9 miles, 5.5km long and 3miles, 1.5km wide. It and it's immediate neighbour to the south Lough Cullin are connected to the sea by that great Salmon river the Moy. Because of this the fishing on L. Conn is quite likely to produce a Salmon as a trout at times. This is an added bonus to what can be at times a great lake for traditional wet-fly tactics. Conn trout have a habit of hitting the fly very hard and coupled with the fact that you could connect to a Salmon I would recommend your cast is at least 8lb b.s. The trout in L. Conn average 1.5 to 2lb, its smaller neighbour L. Cullin reached by going under pontoon bridge to the south produces fish around 3/4 lb. The season on Conn runs from March 1st until September 30th.