The Transcontinental Railroad
![Section of Illustration from p.58 of Crofutt's New Overland Tourist, and Pacific Coast Guide [...] with caption "Pallisades of the Humboldt River, C.P.R.R." Section of Illustration from p.58 of Crofutt's New Overland Tourist, and Pacific Coast Guide [...] with caption "Pallisades of the Humboldt River, C.P.R.R."](https://library.si.edu/sites/default/files/styles/horizontal_box_banner/public/media/taxonomies/crofuttsnewover00crof0080-crop.jpg?itok=oVx8FK1r)
Completed in 1869 with the driving of the famous "Golden Spike" at Promontory Summit, Utah, the Transcontinental Railroad revolutionized transportation across the United States and fundamentally changed the American West, sparking social, economic, environmental, and political change.