According to the United States Census Bureau, in 2008, Idaho had an estimated population of 1,523,816 making it the 39th most populated state. Idaho has a total area of 83,632 square miles (216,632 km²) making it the 14th largest state in the nation
The state's postal abbreviation is ID and its area code is 208. Residents are called "Idahoans". Idaho's nickname is the Gem State because of its abundance of natural resources. The state motto is Esto Perpetua (Latin for "Let it be forever").
The tallest single-structured sand dune in North America is in this park; it rises to 470 feet high above small lakes. The dunes at Bruneau Dunes State Park are unique in the Western Hemisphere. Other dunes in the Americas form at the edge of a natural basin. The Bruneau dunes form near the center. The basin has acted as a natural trap for over 12,000 years. The dunes may have started with sands from the Bonneville Flood about 15,000 years ago. The prevailing winds blow from the southeast 28 percent of the time and from the northwest 32 percent of the time, keeping the dunes fairly stable. Unlike most dunes, these do not drift far.
Reliable historical information about Sacagawea is extremely limited, but she has become an important part of the Lewis and Clark mythology in the public imagination. The National American Woman Suffrage Association of the early twentieth century adopted her as a symbol of women's worth and independence, erecting several statues and plaques in her memory, and doing much to spread the story of her accomplishments.
^"Captain Clark created the nickname "Janey" for Sacagawea, which he transcribed twice, November 24, 1805, in his journal, and in a letter to Toussaint, August 20, 1806. It is thought that Clark's use of "Janey" derived from "jane," colloquial army slang for girl." Anderson, Irving W. "The Sacagawea Mystique"
^Fresonke, Kris and Spence, Mark David. Lewis & Clark: Legacies, Memories, and New Perspectives. University of California Press, February 25, 2004. ISBN 978-0520238220