The southern part of the Brochets river valley is mainly served by the forest road R0202.

[1] The Rivière aux Brochets has its source at the mouth of Stackler Lake (length: 4.7 km (2.9 mi); altitude: 386 m (1,266 ft)).

The mouth of Stackler Lake is located in a forest zone in the unorganized territory of Rivière-Mistassini, at: From the mouth of Stackler Lake, the Rivière aux Brochets flows over 11.2 km (7.0 mi) with a drop of 116 m (381 ft), entirely in the forest zone, according to the following segments: The Brochets River flows into a bend in the river on the northeast bank of the Ashuapmushuan River.

This confluence is located downstream of the Rapides du Fer à Cheval, and at: From the mouth of the Rivière aux Brochets, the current descends the course of the Ashuapmushuan River on 100.4 km (62.4 mi), then crosses lac Saint-Jean eastward on 41.1 km (25.5 mi) (i.e. its full length), follows the course of the Saguenay River via la Petite Décharge on 172.3 km (107.1 mi) east to Tadoussac where it meets the estuary of Saint Lawrence.

[1] The toponym "rivière aux Brochets" was made official on September 29, 1975, at the Place Names Bank of the Commission de toponymie du Québec.