Saint-Zéphirin River

The Saint-Zéphirin River (in French: rivière Saint-Zéphirin) is a tributary on the west bank of the Nicolet Southwest River. It crosses the municipalities of Sainte-Brigitte-des-Saults, Saint-Zéphirin-de-Courval and La Visitation-de-Yamaska, in the Nicolet-Yamaska Regional County Municipality (MRC), in the administrative region of Centre-du-Québec, in Quebec, in Canada.

Geography
The main neighboring hydrographic slopes of the Saint-Zéphirin river are:
 * North side: Nicolet Southwest River, Nicolet River, Lake Saint-Pierre, St. Lawrence River;
 * east side: Nicolet Southwest River, Nicolet River;
 * south side: rivière des Frères, Landroche River, Colbert River, Saint-François River;
 * west side: Lake Saint-Pierre, rivière des Frères, Landroche River, Colbert River.

The Saint-Zéphirin river takes its sources from agricultural streams, between the fifth rang road and the Saint-François River, in the municipality of Sainte-Brigitte-des-Saults.

From its head area, the Saint-Zéphirin river flows on 19.6 km in the following segments:
 * 7.9 km north-west, first along the Chemin du Rang Saint-Pierre in Saint-Zéphirin-de-Courval, to the Chemin du Rang Saint-Pierre, which the river crosses at 200 m east of the intersection of route de l'Église, in the village of Saint-Zéphirin-de-Courval;
 * 3.2 km north, up to the small road joining the chemin du rang Sainte-Geneviève and rang Saint-François in the municipality of Saint-Zéphirin-de-Courval;
 * 8.5 km north, passing east of the village of La Visitation-de-Yamaska where it intersects rue Principale (route 226) on the northeast side of the village, up to its confluence.

The Saint-Zéphirin river flows on the west bank of the Nicolet Southwest River, at 3.2 km downstream from Provencher Island, 2.3 km downstream from the confluence of the Sévère-René River and at 12.3 km upstream from the confluence of the Nicolet Southwest River with the Nicolet River.

Toponymy
The toponym "rivière Saint-Zéphirin" was made official on December 5, 1968, at the Commission de toponymie du Québec.