The Red River of the North is in North America. It starts between the U.S. states of North Dakota and Minnesota. It starts where the Bois de Su River and Otter Tail River come together. It goes north through the Red River Valley. It is the border between North Dakota and Minnesota. It goes through Manitoba, Canada. It ends in Lake Winnipeg. From Lake Winnipeg, the water goes to the Nelson River. Then it ends in the Hudson Bay. The Red River flows through the cities Fargo-Moorhead and Grand Forks in the United States. 