Traces the nineteenth-century exploration of western North America and the impact it had on the United States and Canada. Features information about the fur trade and John Jacob Astor; John C. Fremont's five expeditions in the California area; John Wesley Powell's expedition along the Colorado River and the Grand Canyon; and the Klondike gold rush and Alaska. Includes a chronology and timeline, a glossary, and sources of additional information. http://www.mackinvia.com/3186799 .