| Smoothstone River | |
| Map: | Churchill river hudson basin map.png |
| Map Size: | 250px |
| Pushpin Map: | Saskatchewan#Canada |
| Pushpin Map Size: | 250px |
| Pushpin Map Caption: | Location of river's mouth in Saskatchewan |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Saskatchewan |
| Source1: | Wabeno Lake |
| Source1 Location: | Prince Albert National Park, Saskatchewan |
| Mouth: | Pinehouse Lake |
| River System: | Churchill River |
Smoothstone River[1] is a river in the Canadian province of Saskatchewan. It begins at Wabeno Lake in the Waskesiu Upland and traverses boreal forests and muskeg in the Mid-Boreal Upland[2] en route to Pinehouse Lake of the Churchill River.[3] The Churchill River flows east through Manitoba into Hudson Bay.
Access to Smoothstone River is from Highways 916 and 165.[4]
Smoothstone River begins at the western end of Wabeno Lake[5] of the Waskesiu Hills in Prince Albert National Park and flows west into Lavallée Lake. One of the largest concentrations of nesting American white pelicans and double-crested cormorants in Saskatchewan is supported on Heron Island within Lavallée Lake.[6] From there, the river flows out of the Waskesiu Upland in a northerly direction passing through multiple lakes, the largest of which is Smoothstone Lake. Smoothstone River ends at Pinehouse Lake, which is a lake along the course of the Churchill River.[7] [8]
Fish commonly found in the Smoothstone River include northern pike and walleye.[9]