Rivière Ashberish is a river located in the Témiscouata region of Bas-Saint-Laurent, Quebec, Canada. It flows through a landscape shaped by the broader Témiscouata watershed, a region known for its rich network of lakes and rivers set within the rolling terrain of eastern Quebec. The river exists within a registration division that encompasses well-known water bodies such as Lac Témiscouata and Grand lac Squatec, placing Ashberish within a broader aquatic ecosystem that has historically supported diverse freshwater fish populations. The surrounding municipalities — including Saint-Cyprien, Saint-Juste-du-Lac, Dégelis, Notre-Dame-du-Lac, Cabano, and Saint-Michel-du-Squatec — form the human geography of the region, and the river sits within the original seigneurie de Madawaska survey area, reflecting the deep historical roots of this part of Quebec.