The River Maine in County Kerry, Ireland, is a medium to large river draining a catchment of approximately 400 square kilometres. It is a wild, free-flowing system that supports a notably diverse fish community — in fact, the Maine holds the distinction of having the highest fish species richness of any surveyed river in the Southwest Regional Fisheries Board area, with eight species recorded at its survey site. The river is best known for its strong late-season runs of Atlantic salmon and grilse, as well as a reliable and sizeable run of sea trout that continues throughout the season. Access across the system is limited, and there is no formal management plan in place, giving the Maine a genuinely wild character that appeals to anglers seeking an unmanaged, natural fishery experience.