title: Grønfjellåga
text: # Grønfjellåga
  
  Grønfjellåga (lit. "the river of the green mountain") is a river in the municipality of Rana in Nordland county, Norway. The 17-kilometre (11 mi) long river's source is the lakes Kallvatnet and Kopparvatnet. It then flows through the Grønfjelldalen valley while absorbing several smaller rivers, before it flows out as a tributary to the river Ranelva at the Dunderforsen waterfall (also called Stupforsen).
  
  ## Media gallery
  
  These photos are from a place 3.5 kilometres (2.2 mi) east of Stupforsen:
  
  