The course of the river crosses successively the Assinica Wildlife Reserve and the township of La Rochette.

The lower part is served by some forest roads that come from the south where passes route 113 which connects Lebel-sur-Quévillon to Chibougamau.

The surface of the "Brock North River" is usually frozen from early November to mid-May, however, safe ice movement is generally from mid-November to mid-April.

The "Brock North River" originates at the mouth of a small unidentified lake (length: 1.6 kilometres (0.99 mi), altitude: 459 metres (1,506 ft)) in the Wildlife Reserve Assinica.

The mouth of the "Brock River North" located at: This hydronym evokes the memory of Reginald W. Brock, who, at the end of the 1896 geological exploration campaign, was assistant to Dr. Robert Bell of the Geological Survey of Canada, made a rapid geological reconnaissance of the road between the lakes Waswanipi Lake and Mistassini through the Waswanipi River, Chibougamau and Barlow River rivers and the Lake Waskonichi.