In this text, Mark Eifler examines the experiences of the miners, demonstrates how the gold rush affected the United States, and traces the development of California and the American West in the second half of the nineteenth century. This migration dramatically shifted transportation systems in the US, led to a more powerful federal role in the West, and brought about mining regulation that lasted well into the twentieth century. Primary sources from the era and web materials help readers comprehend what it was like for these nineteenth-century Americans who gambled everything on the pursuit of gold.