Lough Carra is the largest marl lake in Ireland and is part of the Great Western Lakes complex. It covers 1,560 hectares and is joined to Lough Mask by the Keel River. It has many islands and a ragged shoreline with a plethora of bays and promontories, all on a bedrock of limestone.
Lough Carra became famous in the angling community as a top rate, wild brown trout fishery where the trout were free-rising and massive hatches of mayfly, olives and sedges provided the fly fisherman with some of the best opportunities to carry out the traditional techniques of lough-style trout fishing. Unfortunately, changes in the ecology of the lake caused by modern, intensive agriculture in the catchment have resulted in a significant decline in the quality of the trout fishing. The Angling section provides limited information on catch statistics (which will be added to as further historical data are processed), a summary of the current regulations and a map showing some of the features of relevance to anglers.