The surface of Lake Kénogami is usually frozen from the beginning of December to the end of March, however the safe circulation on the ice is generally made from mid-December to mid-March.

Having for main hydrographic basin the Laurentides Wildlife Reserve (by rivers Pikauba, Cyriac and aux Écorces), this body of water, with an area of 59.1 km (36.72 mi) and a volume of 380 million m3 of water, is the source of the rivers Chicoutimi and Aux Sables.

The reservoir waters are retained by the dams Portage-des-Roches, Pibrac-Est and Pibrac-Ouest as well as the Ouiqui, Baie- dikes Cascouia, Moncouche, Coulée-Gagnon, Creek Outlet (1, 2 and 3) and Pibrac (East and West).

This lake has two outlets: The main characteristics (bays, points, islands) around the lake are (clockwise from the outlet Chicoutimi River): South Shore North Shore Épiphane Bay and Cascouia Bay Around Jean-Guy Island Main buildings around the lake From the barrage de Portage-des-Roches, corresponding to the mouth of Lake Kénogami, the current follows the course of the Chicoutimi River on 26.2 km (16.3 mi) towards the east, then the northeast and the course of the Saguenay River on 114.6 km (71.2 mi) eastward to Tadoussac where it merges with the Saint Lawrence estuary.

[4] The toponym "Lac Kénogami" was formalized on December 5, 1968 at the Bank of Place Names of the Commission de toponymie du Québec.