Although California was technically under the authority of Spain (and then Mexico) during the 1700s and early 1800s, in fact neither country exercised practical control much beyond the famous missions of the southern and central coast of California, from San Diego through Monterey to Sonoma.
Taking advantage of Upper Soda Springs' strategic position on the Siskiyou Trail, Ross McCloud built a toll bridge across the Sacramento River next to his inn. Gold miners and mule packers traveling to and from the rich gold fields of Siskiyou County crossed the toll bridge and spent the night at Upper Soda Springs.