Bannock Indians. In historic times their main center was in southeastern Idaho, ranging into western Wyoming, between latitude 42° and 45° North and from longitude 113° West eastward to the main chain of the Rocky Mountains. At times they spread well down Snake River, and some were scattered as far north as Salmon River and even into southern Montana.
Northern Shoshoni Indians. The Northern Shoshoni occupied eastern Idaho, except the territory held by the Bannock; western Wyoming; and north-eastern Utah.