The MacLennan River is a scenic boreal river flowing through the heart of Saskatchewan, Canada. Originating at MacLennan Lake in the Thunder Hills of the Northern Saskatchewan Administration District, the river winds generally southeast through a section of Prince Albert National Park before emptying into Montreal Lake. It sits within the Churchill River drainage basin and is part of the Mid-Boreal Upland ecozone — a landscape defined by dense boreal forest, wetlands, and the rugged character of Canada's northern interior. This is a remote, wild fishery that rewards anglers willing to explore its banks and pools.