Warren is an unincorporated community in the remote north central region of the U.S. state of Idaho, near the Frank Church River of No Return …Warren is an unincorporated community in the remote north central region of the U.S. state of Idaho, near the Frank Church River of No Return Wilderness. Located within the Payette National Forest in southern Idaho County, Warren is northeast of McCall, approximately 50 miles by vehicle and about 30 miles by air. South of the Salmon River, the elevation is 5,906 feet above sea level.