Map shows trail route from Independence, Missouri (and also St. Joseph) to Sacramento, California across the "political divisions of the Great West": Missouri, Kansas, Nebraska, South Dakota, Wyoming, Colorado, Idaho, Utah, Oregon, California, and Nevada, landmarks and areas of Indian habitation. Includes note describing area and history of the route. Inset: United States west of Mississippi River showing political divisions in 1849. Relief shown by hachures. Scale not given.

Map shows county lines, cities and towns, military posts, existing and proposed railroad routes, areas of Native American habitation, and mineral resources; territories of Washington, Montana, Idaho, Utah, and Arizona. Relief shown by hachures and spot heights. Scale [ca. 1:2,680,000] and [ca. 1:2,450,000].

Map shows historic routes of exploration, suggested routes of travel to California's Gold region, Oregon, areas of Native American habitation, and major cities. Includes text in lower panel: "Important directions to persons emigrating to California" and "Description of California, or the new gold region." Relief shown by hachures. Depths by soundings. Scale [ca. 1:6,000,000] and [ca. 1:40,000,000].