Langvassåga is a river that flows out of the lake Langvatnet in the municipality of Rana in Nordland county, Norway. It flows in a southeastern direction and almost immediately, it is joined by the river Røvassåga. It then continues a short distance southwards before joining the main river Ranelva, just south of the village of Røssvoll. The Langvassåga catchment area covers about . The river passes by the Mo i Rana Airport, Røssvoll. Media gallery See also List of rivers in Norway References Rana, Norway Rivers of Nordland Rivers of Norway