Waterhen River

The Waterhen River is an east-flowing river in the north-west area of the Canadian province of Saskatchewan in the drainage basin of the Beaver River. It is north of and parallel to the east-flowing part of the Beaver River and joins the north-flowing part of that river. Most of the river and its drainage basin is at the southern edge of the boreal forest belt. While the river's source is Lac des Îles, its tributaries reach well into the neighbouring province of Alberta.

Cree began moving into the area in the eighteenth century. There was a canoe route up the Waterhen River with a portage to the Beaver River on the south side of Cold Lake. The first trading post in the area was Cold Lake House built by the Montreal traders in 1781 near the present Beaver Crossing, Alberta, south of Cold Lake. Around 1790 the North West Company had a post on Waterhen Lake.