The Fergus Estuary is a large, triangular branch of the Shannon Estuary, extending north towards Ennis in County Clare. It is a complex coastal environment characterized by a multitude of low-lying islands, intricate channels, and vast mudbanks. The western side of the estuary features numerous islands such as Coney Island, Inishdadroum, Inishmacowney, and O’Grady’s Island, separated by narrow waterways. These channels are noted for being intricate and, according to historical sailing directions, can be unfit for navigation except for small vessels due to their narrowness, the strength of the tides, and frequent shallows, despite some spots having significant depth. This indicates that paddlers must exercise caution regarding tidal currents and potential grounding. The area is part of the River Shannon and Fergus Estuary Special Protection Area, highlighting its ecological importance. Wildlife includes breeding seabirds such as Razorbills, Common Guillemots, and European Shags. The landscape holds significant historical and archaeological interest, with evidence of medieval V-shaped wooden fishing structures and ancient settlements dating back to the Bronze and Iron Ages visible in the intertidal zone. The islands themselves, like Coney Island with its ruins of a 6th-century church built by St Brendan and its abandoned village, offer a stark, austere beauty. Paddling here provides a journey through a maritime historic landscape, though it is beautiful yet not well-known. The overall experience is one of exploring a secluded, archaeologically rich estuary with open aspects in some areas and dense tree cover on many islands, requiring careful navigation of its tidal channels.