Wood Mountain Hills are a hilly plateau in the Canadian province of Saskatchewan. The hills are located in the southern part of the province and are part of the Missouri Coteau, which is part of the Laurentian Divide between the watersheds of the Hudson Bay drainage basin of the Arctic Ocean and the Gulf of Mexico of the Atlantic Ocean. The hills are in a semi-arid region known as Palliser's Triangle in the Great Plains ecoregion of North America.

Poplar River is a tributary of the Missouri River, approximately 167 miles (269 km) long in Saskatchewan in Canada and Montana in the United States. The river is composed of three main forks – West, Middle, and East Poplar Rivers – that have their source in the Wood Mountain Hills of the Missouri Coteau. Along the river's Middle Fork in Saskatchewan, there is a coal-fired power station. There are also dams built along the river's forks.