Transcontinental Railroad Images
The CP Progenitor
Theodore Judah, engineer, surveyor, and father of the Central Pacific.
Scoundrel of the UP
Thomas "Doc" Durant at the Union Pacific's end of track:
Laying the Track
Construction work along the Union Pacific.
Marketing the Iron Horse
Here's an advertisement for the opening of the line to the Pacific—note the travel time from Omaha to San Francisco.
Promontory Point in Pictures
The Central Pacific Railroad Photographic Museum site maintains a page with several photos from the ceremony marking the completion of the transcontinental railroad in 1869.