The boundary dividing the Connemara and Galway Fishery Districts is between the Costello and Formoyle system and Ballynahown Loughs and Crumlin system. Anglers are advised to acquaint themselves with the licence requirements for salmon and sea trout, details of which are given at the beginning of the guide. Cashla River (Costello River) The Cashla River is some four miles in length and is divided into four beats. Fishing from either bank presents no problems. From late in the month of May onwards the grilse run this river but it is as a sea trout fishery that it is most renowned. The sea trout run the river from early in the month of June through to the end of the season. Glennicmurrin Lough This is the largest lough in the Costello fishery and is divided into four beats. A boat is available on each of the four beats and access to the boat piers is by bog roads, information on which is obtainable from the fishery manager. There are very big runs of sea trout into Gennicmurrin Lough from the middle of the month of June onwards with the grilse being fairly plentiful at times. Lough Cloonadoon Lough Cloonadoon is a short distance upstream from Glennicmurrin Lough and access to it is from the Costello/Oughterard road. This lough is seldom fished as it holds very few sea trout. The lough is very deep and holds mainly brown trout, with September being the best month for angling. Lough Naskeha This lough is located to the east of the Costello/Rosmuc road about four miles from Costello. It is a very shallow lough and holds only a stock of small brown trout. Cloondola Lough (Rusheen Lough) This relatively small lough is just a few hundred yards down stream from Formoyle Lough and access to it is by boat which is available for hire. From the end of July to the end of the season there is good sea trout fishing on this lough with quite a number of fish of over three pounds being caught annually. Lough Formoyle Lough Formoyle is located close to Fermoyle Lodge, which is beside the Costello/Oughterard road a distance of some eight miles from Costello. The sea trout enter this part of the fishery towards the end of the month of July and the fish tend to be well above the average weight, some being recorded at six pounds in weight. There is one boat for hire on this lough. Muchanagh Lough and Muckanaghkillew Lough There are two fairly large loughs named as Muckanagh Lough and Muckanaghkillew Lough on the ordanance survey maps, both adjacent to each other and joined by a narrow stream. Access to these loughs is off the Costello/Screebe road near to the schoolhouse at Kinvarra. From the middle of July through to the end of the season the locally known Muckanagh Lough has a very good run of sea trout. There are boats for hire on these loughs. Dereen Lough (Derrecnacummer Lough) This lough is in reality a large pool on the river some eight hundred yards upstream from Lough Fermoyle where the river runs quite close to the Costello/Oughterard road. Fishing stands are provided on this lough and it is regarded as being one of the best lies for salmon and sea trout in the fishery. Lough Carrickillawalia (Carrick Lough) This lough is one and a half miles upstream from Lough Formoyle and access to it is across the bog from the Costello/Oughterard road, a distance of three-quarters of a mile. Although the sea trout run into this lough early in the month of July the fishing is best at the end of the month of August and during the month of September. Some salmon also run into this lough. There is one boat for hire. Lough Clogher (Aclogher Lough) The next lough on this system is Lough Clogher which has one boat for hire. It is one and a half miles upstream from Lough Carrickillawallia and access to it is by the forestry road which is about six miles from Oughterard and is eight miles from Costello. As with Lough Carrickilawallia, the sea trout run into it in mid-July but the fishing is best during the months of August and September. Salmon occasionally run into this lough as well. Lough Enoer This lough is a brown trout fishery. Access to it is via the road near Furnace Bridge that leads to the village of Lettermore. From here there is a pathway across the hill and down to the lake shore. Loughaunierin Lough This is the most inaccessible lough on the fishery as it is nearly two miles from the nearest roadway. Loughaunierin Lough is some two miles north/east from Lough Clogher. Although it is seldom fished it is reputed to hold good stocks of sea trout during the months of August and September. Shannawona Lough Shannawona Lough is the last of the sea trout loughs on the Cashla River System. Access to it is not easy as it is necessary to walk two miles upstream from Lough Clogher to reach it. The sea trout arrive late in the season in this lough and the fishing is best in the month of September and in early October. There are no boats on this lough so the angler must be content to fish from the shore. Besides all of the above listed loughs there are several other small un-named loughs in the upper part of the Cashla System. Most of these loughs hold stocks of small brown trout. The School House Loughs Some six miles from the village of Costello to the east of the Costello/Oughterard road there are about twelve small loughs known locally as The School House Loughs. Two of these are worthy of the angler's attention, Lough Navreaghly and Lough Bovroughaun. The sea trout run into these loughs during late July and early August and the fishing is best during the months of August and September. These loughs together with all the other School House Loughs all hold stocks of small brown trout, and there are two boats for hire.