The Rivière Gatineau is a significant river system flowing through the Outaouais region of Quebec, Canada, ultimately joining the Ottawa River near the city of Gatineau. Stretching through La Vallée-de-la-Gatineau and Les Collines-de-l'Outaouais, this river offers a diverse and productive fishery for a wide range of warmwater and coolwater species. The river's varied character — from its upper reaches through forested Quebec countryside to its lower sections near the confluence with the Ottawa River — provides habitat for an impressive mix of fish that draws anglers from across the region throughout the open-water season.