The Petite rivière Batiscan is a tributary of the east bank of the rivière à Pierre, flowing in the unorganized territories of Linton (township of Tonty), in Saint-Raymond (township of Roquemont) and in the municipality of Rivière-à-Pierre (township of Bois), in the Portneuf Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec, in Canada.

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

Since the mid-19th century, forestry has been the predominant activity of the Little Batiscan River watershed.

The Little Batiscan River has its source in a forest area, at the mouth of Lac à Pierre (length: 1.8 kilometres (1.1 mi); altitude: 464 metres (1,522 ft)).

The mouth of this lake is located 30.6 kilometres (19.0 mi) to the northwest of the center of the village of Saint-Raymond, 26.7 kilometres (16.6 mi) to the northeast of the confluence of the rivière à Pierre and 51.3 kilometres (31.9 mi) north of the north bank of the Saint Lawrence river, at the height of Portneuf.