The river surface is generally frozen from mid-December to the end of March.

Safe traffic on the ice is generally from late December to early March.

The main hydrographic slopes neighboring the Saint-Pierre river are: The Saint-Pierre river takes its source from a set of agricultural streams (notably the Cordon and Marcotte streams) draining the area north of the town of Saint-Rémi.

From Saint-Rémi, the Saint-Pierre river flows north into agricultural land.

The toponym "Rivière Saint-Pierre" was formalized on December 5, 1968, at the Commission de toponymie du Québec.