Rivière Nicolet Sud-Ouest is a stream flowing through the Centre-du-Québec region of Quebec, Canada, draining through a landscape shaped by the Eastern Townships' rolling terrain. The river is perhaps best known among local anglers as a rainbow trout destination, and it also supports a notable diversity of aquatic life, including species of significant conservation interest. The river passes through the municipality of Dudswell and the broader Shipton and Wotton areas, offering a relatively intimate stream fishing experience in a rural Quebec setting.