It is fed from multiple sources and glaciers at the southern end of the valley.

The river is about 8 kilometres (5 mi) long and flows north through the Val Curnera.

Approximately in the middle of its route, a dam was constructed by Kraftwerke Vorderrhein AG (the local hydropower company), which formed Lai da Curnera.

The Rein da Curnera flows into the Anterior Rhine near Tschamut in the Tujetsch valley.

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