Westward Expansion Maps

Striking Map of Oregon Territory from the United States' Largest Exploration Expedition

This rare 1765 map focuses on the Spanish and Mexican borderlands, particularly California and parts of modern-day Arizona.

This map, produced under the direction of Ferdinand Vandeveer Hayden in 1881, was a crucial tool in the scientific exploration and development of the American West, providing one of the most detailed early surveys of western Colorado and Utah, aiding in geological studies, resource assessment, and territorial expansion.

The 1880s marked the decline of the frontier, with railroads, mining, and settlement driving rapid transformation.

Hayden’s surveys played a crucial role in shaping public understanding of the Western frontier, influencing land use, conservation, and scientific study.

This detailed map represents a segment of the U.S. Pacific Railroad Surveys, a series of explorations commissioned by Congress to determine the most practical and economic route for a transcontinental railroad.

A magnificent map showing Texas as a province, Upper California and Mexico, and of importance for showing Jedediah Smith's journey to California and back in 1826.

One of the most important maps in American History, this was the map that was used to negotiate the Treaty of Guadalupe-Hidalgo that brought the Mexican American War to a close.

An exceptional map of California, Nevada and Utah by Bancroft and Company. A.L. Bancroft and CompanyMap of California, Nevada, Utah and Arizona. The folding map’s portability meant that the map could be used in the field as a travel resource.