At the end of the 19th century, the extraction of marble stones developed, as well as agriculture and recreational tourism.

The "Pierre river" has its source in a forest area at the mouth of Lac Cristal (length: 2.5 kilometres (1.6 mi); altitude: 457 metres (1,499 ft)).

Some authors have associated this name with the pioneer Pierre Beaupré (1884-1920) who settled on the banks of this river at the end of the 19th century.

Given the mention of 1829, the stony character of the river bed and its rocky outskirts has certainly inspired cartographers and local leaders in the designation of this watercourse.

[2] The toponym "Rivière à Pierre" was formalized on December 5, 1968, at the Commission de toponymie du Québec.