Grønfjellåga
| Grønfjellåga | |
|---|---|
 |
|
| Country | Norway |
| Basin features | |
| Main source | Kopparvassdalen valley |
| River mouth | Ranelva river |
| Physical characteristics | |
| Length | 17 km (11 mi) |
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).
These are from 3.5 km east of Stupforsen:
Coordinates: 66°22′24″N 14°35′32″E / 66.3734°N 14.5922°E
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