In descending order of land area it is located in Ada, Elmore, Owyhee, and Canyon counties.
National Football League | National Register of Historic Places | National Hockey League | Mississippi River | England national football team | River Thames | National Basketball Association | Nelson Mandela | National Science Foundation | National Geographic | Amazon River | Columbia River | Willie Nelson | National Trust | National Endowment for the Arts | National Geographic Society | Argentina national football team | National Trust for Places of Historic Interest or Natural Beauty | National Park Service | National League | Australian National University | National Guard | National Geographic Channel | National Institutes of Health | local government area | Hudson River | National Guard of the United States | National Collegiate Athletic Association | Colorado River | United States National Research Council |