The main neighboring watersheds of the Petite rivière du Chêne are: The Petite rivière du Chêne has its source in a forest zone, south of a marsh area, south of highway 20, at 3.6 kilometres (2.2 mi) at north of the village of Lourdes, in the municipality of Notre-Dame-de-Lourdes (almost on the edge of Villeroy).

[1] From its head area, the Petite rivière du Chêne flows over 63 kilometres (39 mi) with a drop of 123 metres (404 ft), divided into the following segments: Upper course of the river (segment of 35.4 kilometres (22.0 mi)) Lower course of the river (segment of 28.2 kilometres (17.5 mi)) From the confluence of the Creuse River, the Petite rivière du Chêne flows over: The Petite rivière du Chêne flows over the flats of the south shore of the Estuary of Saint Lawrence, at the limit of Deschaillons and Leclercville.

Its confluence is located at Pointe Des Robert, 3.3 kilometres (2.1 mi) west of the center of the village of Leclercville, at 4.4 kilometres (2.7 mi) north-east of the center of the village of Parisville and 5.6 kilometres (3.5 mi) east of the center of the village of Deschaillons.

It is also located at 3.3 kilometres (2.1 mi) west of the confluence of Rivière du Chêne and 18.3 kilometres (11.4 mi) east of the confluence of Rivière aux Orignaux.

[1] In the Abenaki language the "little river" is like its "big neighbor" Rivière du Chêne (wachilmezi) like an oak acorn (wachil).