The Caniapiscau River is a tributary of the Koksoak River in Nunavik, Quebec, Canada. In Cree the name of the river means rocky point. Starting from Lac Sevestre on the Canadian Shield, the Caniapiscau River flows northward through a wide, timbered glacial valley until it makes a sharp turn at its confluence with the Rivière aux Mélèzes. At this poin…The Caniapiscau River is a tributary of the Koksoak River in Nunavik, Quebec, Canada. In Cree the name of the river means rocky point. Starting from Lac Sevestre on the Canadian Shield, the Caniapiscau River flows northward through a wide, timbered glacial valley until it makes a sharp turn at its confluence with the Rivière aux Mélèzes. At this point, the river becomes the Koksoak River. The total length of the Caniapiscau River is 737 kilometres.