Saint-Cyr River South

Saint-Cyr South
Watershed of Nottaway River
Location
CountryCanada
ProvinceQuebec
RegionNord-du-Québec
Physical characteristics
SourceBarry Lake (Saint-Cyr River South)
  locationEeyou Istchee James Bay (municipality), Nord-du-Québec, Quebec
  coordinates48°58′10″N 75°32′34″W / 48.96944°N 75.54278°W / 48.96944; -75.54278
  elevation392 m (1,286 ft)
MouthMégiscane River
  location
Eeyou Istchee James Bay (municipality), Nord-du-Québec, Quebec
  coordinates
48°35′29″N 76°46′16″W / 48.59139°N 76.77111°W / 48.59139; -76.77111
  elevation
293 m (961 ft)
Length50.1 km (31.1 mi)
Basin features
Tributaries 
  rightChartrand River

The Saint-Cyr River South is a tributary of the Mégiscane River (via the Canusio Lake, flowing into Senneterre, in the administrative region of Abitibi-Témiscamingue, in Quebec, in Canada.

The river Saint-Cyr Sud flows successively into the cantons of Bailly, Kalm, Mesplet and Cherrier. Forestry is the main economic activity of the sector; recreational tourism activities, second.

The valley of the Saint-Cyr South River is served by the forest road R1053 (east–west direction) which passes on the north-west side and north of Lac Saint-Cyr. This road joins the road R1009 (north–south direction) which passes to the east of the Aigle River (Doda Lake).

The surface of the Saint-Cyr South River is usually frozen from early November to mid-May, however, safe ice circulation is generally from mid-November to mid-April.