Rogerstown Estuary is a significant tidal estuary on the east coast of County Dublin, Ireland, approximately 16 miles north of Dublin city near the village of Rush. Encompassing an area of about 1.4 square miles, this estuarine system is characterized by extensive saltwater marshes, wet meadows, mudflats, and winding creeks. The estuary is divided into inner and outer portions by a railway viaduct carrying the Dublin to Belfast line. At low tide, vast areas of sand and mudflats are exposed, with the water retreating to a deep main channel. The area is ecologically vital, designated as a Statutory Nature Reserve, a Special Protection Area (SPA), a Special Area of Conservation (SAC), and a Ramsar Wetland of International Importance, primarily for its wintering bird populations. For anglers, it offers diverse shore fishing opportunities, particularly for bass and sea trout, with the dynamic tidal flow dictating the best fishing times and locations.