This map shows the southwestern portion of the United States and northern portion of Mexico. U.S. states are outlined in color and numbered (corresponding to an index of states and territories in the lower left corner). Additionally, cities, bodies of water, the names and locations of some Native American Indian tribes, and geographic features are marked (with relief shown by hachures).

Map shows overland routes from St. Joseph and Independence, Missouri to the West, one crossing through California gold country and ending in Sacramento, California, and the other continuing on into Oregon; areas of Native American habitation, major cities and towns, and landmarks. Inset: "United States West of Mississippi River showing political divisions in 1849." Relief shown by hachures. Scale not given.

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.