| MacLennan River | |
| Map: | Churchill river hudson basin map.png |
| Map Size: | 255px |
| Pushpin Map: | Saskatchewan#Canada |
| Pushpin Map Size: | 255px |
| Pushpin Map Caption: | Location of river's mouth in Saskatchewan |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Saskatchewan |
| Source1: | MacLennan Lake |
| Source1 Location: | Northern Saskatchewan Administration District |
| Mouth: | Montreal Lake |
| Mouth Location: | Northern Saskatchewan Administration District |
| River System: | Churchill River |
| Tributaries Right: | Crean River |
MacLennan River[1] is a river in the Canadian province of Saskatchewan. It begins at MacLennan Lake in the Thunder Hills[2] of the Northern Saskatchewan Administration District. It then flows generally south-east out of the hills, through a section of Prince Albert National Park, and on to Montreal Lake.[3] MacLennan River is within the Churchill River drainage basin[4] and is in the Mid-Boreal Upland ecozone of Canada.[5]
MacLennan River begins at MacLennan Lake at over above sea level on the western slopes of the Thunder Hills. From there, it heads south then south-east through boreal forests and muskeg. There are several lakes along the course of the river en route to the western shore of Montreal Lake, including Tourist Lake, Wassegam Lake, Tibiska Lake, and O'Connor Lake.
The primary tributary for MacLennan River is Crean River. It originates at the 12550.7ha Crean Lake[6] south of MacLennan River's mainstem. Crean Lake is the largest lake in Prince Albert National Park.[7] Crean River meets MacLennan River near Montreal Lake. The tributaries that flow into the river from the north originate in the Thunder Hills.[8] Two highways, Highway 916 and Highway 2, cross MacLennan River.[9]
MacLennan River Recreation Site[10] is a provincial recreation site on the banks of the MacLennan River at the Highway 2 crossing. The park has six unserviced campsites, a picnic area, hiking trails, and access to the river for fishing. Walleye are a commonly caught fish in the river. The hiking trails follow the river upstream into Prince Albert National Park.[11]