Crossword clues for Niagara River's source 8 letters:LAKEERIENiagara River's sourceERIENiagara River sourceERIEOne of the Niagara River's sourcesERIENiagara River's sourceERIELake ___, source of the Niagara RiverERIELake that's the source of the Niagara RiverERIESource of the Niagara RiverERIELake source of the Niagara RiverERIENiagara River's lake sourceXXXXLake that's the source of the Niagara River