Might be of interest that most all of the supplies going in and the ore going out was shipped/frieghted by wagon trains over the Sonora Pass. Most supplies came via Stockton. If anyone has been over Sonora pass, it's hard to imagine a horse and wagon getting over those mtns., but that is indeed how they did it back then.
I wonder if the wagons each had four horses... that would be four wheel drive, right?
WRM