The Columbia River redband trout,[1] the inland redband trout[2] or the interior redband trout[1] (Oncorhynchus mykiss gairdneri) is one of three redband trout subspecies of the rainbow trout in the family Salmonidae.[3] It is native in the Columbia River and its tributaries in Idaho, Oregon, Washington and Montana. It includes sea-run anadromous forms, which are known as redband steelhead. Also the large Kamloops rainbow trout is included.[2]