This river of the Batiscanie rises in "Lac Noir" (Black Lake) (popularly designated "Morin Lake"), located at 1 kilometers (measured in direct line) at the East of Lac-à-la-Tortue, at the limit of Hérouxville, Quebec (Row X) and Saint-Narcisse (Row "Côte Saint-Pierre Coté Sud" and First row of Radnor).