| Gilbert River | |
| Pushpin Map: | Quebec |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quebec |
| Subdivision Type3: | Region |
| Subdivision Name3: | Saguenay-Lac-Saint-Jean |
| Subdivision Type4: | Regional County Municipality |
| Subdivision Name4: | Le Fjord-du-Saguenay Regional County Municipality |
| Subdivision Type5: | Unorganized territory and a city |
| Subdivision Name5: | Lac-Ministuk |
| Length: | 8.4km (05.2miles) |
| Discharge1 Location: | Lac-Ministuk |
| Source1: | Lac Prud’homme |
| Source1 Location: | Lac-Ministuk |
| Source1 Coordinates: | 48.0435°N -71.262°W |
| Source1 Elevation: | 720 |
| Mouth: | Cyriac River |
| Mouth Location: | Lac-Ministuk |
| Mouth Coordinates: | 48.0972°N -71.2481°W |
| Mouth Elevation: | 480m (1,580feet) |
| River System: | Saguenay River |
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.[1]
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.
The main watersheds adjacent to the Gilbert River are:
The Gilbert River has its source at Prud’homme Lake (length: 0.3km (00.2miles); altitude: 720m (2,360feet)). 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 8.4km (05.2miles), with a drop of 240km (150miles) 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 34.2km (21.3miles) to the north, then the current crosses Lake Kénogami on 6.3km (03.9miles) northeasterly to barrage de Portage-des-Roches, then follows the course of the Chicoutimi river on 26.2km (16.3miles) eastward, then northeasterly and course of the Saguenay river on 114.6km (71.2miles) eastward to Tadoussac where it merges with the Saint Lawrence estuary.
The toponym “Gilbert River” was formalized on December 5, 1968, at the Place Names Bank of the Commission de toponymie du Québec.[3]