The Cree (Cree: Nēhiyaw; French: Cri) are one of the largest groups of First Nations in North America, with over 200,000 members living in Canada. The major proportion of Cree in Canada live north and west of Lake Superior, in Ontario, Manitoba, Saskatchewan, Alberta and the Northwest Territories. About 38,000 live in Quebec.
In the United States, this Algonquian-speaking people historically lived from Lake Superior westward. Today, they live mostly in Montana, where they share a reservation with the Ojibwe (Chippewa).
The documented westward migration over time has been strongly associated with their roles as traders and hunters in the North American fur trade. Wikipedia