In the 1880s, the Central Pacific Railroad labored through the rugged upper Sacramento River canyon to connect California with the far northwest. Where the canyon's steep walls open up to a view of snowcapped Mount Shasta, a railroad switching yard, a depot, a roundhouse, a turntable, and repair shops were constructed. Surrounded by virgin timber, rushing waters, and dramatic geologic formations, this railhead camp--named for a Canadian collier--grew...