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Coulombe River facts for kids

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Colombe River
Coulombe River upstream of Center Road in Beaulac-Garthby.
Country Canada
Province Quebec
Region Estrie
MRC Le Haut-Saint-François Regional County Municipality
Municipality Saints-Martyrs-Canadiens and Weedon
Physical characteristics
Main source Marsh area
367 m (1,204 ft)
45°51′48″N 71°31′43″W / 45.86333°N 71.528536°W / 45.86333; -71.528536
River mouth Lake Louise (Estrie), Saint-François River
248 m (814 ft)
45°49′32″N 71°23′43″E / 45.82555°N 71.39528°E / 45.82555; 71.39528
Length 138 km (86 mi)
Basin features
Progression Saint-François River, St. Lawrence River

The Coulombe River is a tributary of lake Aylmer which is crossed by the Saint-François River which constitutes a tributary of the south shore of St. Lawrence River.

The course of the Coulombe River flows on the South Shore of the St. Lawrence River, in Quebec, Canada. It crosses the territory of the municipalities of:

  • Saints-Martyrs-Canadiens, located in the MRC Arthabaska Regional County Municipality, in the administrative region of Centre-du-Québec;
  • Beaulac-Garthby, located in the Les Appalaches Regional County Municipality (MRC), in the administrative region of Estrie.


The main neighboring watersheds of the Coulombe River are:

The Coulombe River has its source in a marsh area 2.0 kilometres (1.2 mi) west of Mont Louise, 1.6 kilometres (0.99 mi) south of the village center Saints-Martyrs-Canadiens, 1.2 kilometres (0.75 mi) east of an abandoned quarry and 1.6 kilometres (0.99 mi) south of Sunday Lake.

From this marsh area, the course of the Coulombe River flows over 13.8 kilometres (8.6 mi) divided into the following segments:

  • 3.1 kilometres (1.9 mi) eastward, up to the confluence of the outlet of Lac Rond;
  • 2.6 kilometres (1.6 mi) eastward, to the north shore of Lac Coulombe;
  • 0.8 kilometres (0.50 mi) crossing to the south-east the Coulombe lake (length: 1.4 kilometres (0.87 mi); altitude: 301 metres (988 ft)), i.e. the main plane of water drained by the Coulombe River;
  • 0.8 kilometres (0.50 mi) east, up to route 161 which the river crosses at 4.2 kilometres (2.6 mi) west of the intersection of route 112;
  • 2.8 kilometres (1.7 mi) eastward, to the confluence of the Coulombe North River which is the main tributary;
  • 2.2 kilometres (1.4 mi) south-east to a country road;
  • 1.5 kilometres (0.93 mi) towards the south-east, to its mouth.

The Coulombe River empties on the west shore of Ward Bay of lake Aylmer. The mouth is located 1.3 kilometres (0.81 mi) (in a direct line) southwest of the intersection of route 161 and route 112 from the village of Beaulac-Garthby.

The resort is particularly developed around Ward Bay.


The toponym Rivière Coulombe was officially registered on December 5, 1968 at the Commission de toponymie du Québec.

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