Topic summaryMuonionjoki Expand Summary Muonionjoki (Finnish: Muonionjoki or Kätkäsuvanto; Swedish: Muonio älv or Muonioälven; Meänkieli: Muonionväylä) is a river in northern Finland and Sweden. It is a tributary of the Tornio. Together the two rivers form the border between Finland and Sweden. The river is 230 kilometres long. Wikipedia source
