It flows through the municipalities of Sainte-Edwidge-de-Clifton, Martinville, Compton, Cookshire-Eaton, Lennoxville, from Sherbrooke, Quebec, Canada.

[1] The surface of the Rivière aux Saumons is usually frozen from mid-December to mid-March, except the rapids; however, safe circulation on the ice is generally from late December to early March.

From its source, the course of the Rivière aux Saumons descends on 70.6 km (43.9 mi), with a drop in level of 228 m (748 ft).

Upper course of the river (segment of 39.3 km (24.4 mi)) From Lac Lindsay, the "Rivière aux Saumons" flows on: Lower river (segment of 31.3 km (19.4 mi)) From the village bridge of Martinville, the "Rivière aux Saumons" flows over: The mouth of the "Rivière aux Saumons" flows onto the south-eastern bank of the Massawippi River.

The toponym "rivière aux Saumons" was formalized on October 6, 1983, at the Commission de toponymie du Québec.