The River Fane is a 38.25-mile-long river in Ireland that flows from County Monaghan to Dundalk Bay in County Louth. It originates in Lough Ross on the border of County Monaghan and County Armagh, meandering through Counties Monaghan, Louth, and Armagh before reaching the Irish Sea. The Fane is a crucial source of fresh water for Dundalk and surrounding areas, but faces pollution issues from illegal fuel laundering operations affecting salmon stocks in the region.