In the 1880s the California and Nevada Railroad and its predecessor, the California and Mount Diablo Railroad, proposed to run a narrow gauge railroad over Sonora Pass with a line running from Emeryville - Stockton and then connecting with the Denver and Rio Grande Railroad in Utah.
In the 1880s, the California and Nevada Railroad and its predecessor, the California and Mount Diablo Railroad, suggested constructing a narrow gauge railroad through Sonora Pass with a route from Emeryville to Stockton and then linking up with the Denver and Rio Grande Railroad in Utah.