Mistaiyohe

Mistaiyohe is a recorded name for the Moreau River, a tributary of the Missouri in the northern Plains. Its forks rise in the prairie west of the Missouri and join a river that winds eastward through a broad basin. Near its mouth the Moreau enters the Missouri below the Grand River. The Lewis and Clark expedition passed this watercourse in 1804 on its way toward the Arikara villages.