Gilbert River (Cyriac River tributary)
The Gilbert River is a freshwater tributary of the Cyriac River, flowing in the unorganized territory of Lac-Ministuk, in the Le Fjord-du-Saguenay Regional County Municipality, in the administrative region of Saguenay–Lac-Saint-Jean, in the province of Quebec, in Canada. The Gilbert River is accessible by route 175; other secondary forest roads have been developed in the sector for the needs of forestry and recreational tourism activities . Forestry is the primary economic activity in the sector; recreational tourism, second. The surface of the Gilbert River is usually frozen from late November  to early April, however safe circulation on the ice is generally from mid-December to late March. Geography. The main watersheds adjacent to the Gilbert River are: The Gilbert River has its source at Prud’homme Lake (length: ; altitude: ). The northern mouth of Lake Prud’homme is located at: From Lac Prud'homme, the course of the Gilbert River generally flows west, then north, over , with a drop of entirely in forest areas, according to the following segments: The Gilbert River flows onto the west bank of the Cyriac River. This confluence is located at: From the confluence of the Gilbert river with  the Cyriac river, the current descends the latter on to the north, then the current crosses Lake Kénogami on northeasterly to barrage de Portage-des-Roches, then follows the course of the Chicoutimi river on eastward, then northeasterly and course of the Saguenay river on eastward to Tadoussac where it merges with the Saint Lawrence estuary. Toponymy. The toponym “Gilbert River” was formalized on December 5, 1968, at the Place Names Bank of the Commission de toponymie du Québec.