This last road comes from Chibougamau, going north-east to the south-eastern part of Mistassini Lake.

The surface of the Natevier River is usually frozen from early November to mid-May, however, safe ice circulation is usually from mid-November to mid-April.

The main hydrographic slopes adjacent to the "Natevier River" are: The Natevier River originates at the mouth of Cummings Lake (length: 1.2 kilometres (0.75 mi) altitude: 414 metres (1,358 ft)) in the township of Roy.

This lake is located on the west side of Mount Cummings with a peak of 600 metres (2,000 ft).

The latter is crossed to the northwest by the Waswanipi River which is a tributary of Matagami Lake.