The Cyriac River crosses the Laurentides Wildlife Reserve. The Cyriac river valley is directly served by the route 175; other secondary forest roads have been developed in the sector for forestry and recreational tourism activities. Forestry is the primary economic activity in the sector; recreational tourism, second. The surface of the Cyriac River is usually frozen from the end of November to the beginning of April, however the safe circulation on the ice is generally done from mid-December to the end of March.
west side: Ministuk lake, Gilbert River, Pikauba River.
The Cyriac river rises at Lake Pikauba. Enclosed between the mountains, this lake has two outlets: the Cyriac river and the Pikauba river. The north mouth of Pikauba Lake is located at:
south-east of the confluence of the Cyriac River and Kenogami Lake.
From Pikauba Lake, the course of the Cyriac river generally flows northwest over, with a drop of entirely in the forest zone, according to following segments: Upper course of the Cyriac river
towards the northwest by forming a loop towards the east at the beginning of the segment, up to the outlet of Lac Paquin;
meandering northwest, crossing Lake Muy and collecting the hay stream discharge, up to Beaver Creek ;
to the northwest by collecting the outlet from Lake Sims, to Vermette stream ;
along route 175, first towards the northwest, then north and northwest, and crossing the forest road R0287, up to the confluence of the river Gilbert ;
towards the northwest by collecting the Hector stream at the beginning of the segment, by forming a hook toward the northeast and along the west side of the city limit of Saguenay at the end of the segment, up to the confluence of the Jean-Boivin River ;
to the north in a deep valley, along the western side of the city limit of Saguenay, to its mouth.
The Cyriac river flows on the south shore of Lake Kénogami, facing Île Verte and facing Baie Voisine de l'Île à Jean-Guy. This confluence is located at:
west of the confluence of the Simoncouche River and Kenogami Lake;
south-west of the confluence of the Chicoutimi and Saguenay rivers.
From the confluence of the Cyriac river with Kenogami Lake, the current crosses this lake for northeast to the dam of Portage-des-Roches, then follows the course of the Chicoutimi river on to the east, then the northeast and the course of the Saguenay river on east to Tadoussac where it merges with the Saint Lawrence estuary.
Toponymy
The name of the river was given in honor of Cyriac Buckell, German settler and trapper, installed on the banks, facing the mouth of this river at the time of the colonization of the territory. He was, moreover, the first settler to settle there. The toponym "Cyriac River" was formalized on December 5, 1968, at the Place Names Bank of the Commission de toponymie du Québec.
