On February 2, 1811, Russian settlers established Ft Ross trading post north of San Francisco. From the article:
"Russians establish Fort Ross in California
Staking a tenuous claim to the riches of the Far West, Russians establish Fort Ross on the coast north of San Francisco.
As a growing empire with a long Pacific coastline, Russia was in many ways well positioned to play a leading role in the settlement and development of the West. The Russians had begun their expansion into the North American continent in 1741 with a massive scientific expedition to Alaska. Returning with news of abundant sea otters, the explorers inspired Russian investment in the Alaskan fur trade and some permanent settlement. By the early 19th century, the semi-governmental Russian-American Company was actively competing with British and American fur-trading interests as far south as the shores of Spanish-controlled California.
Russia’s Alaskan colonists found it difficult to produce their own food because of the short growing season of the far north. Officials of the Russian-American Company reasoned that a permanent settlement along the more temperate shores of California could serve both as a source of food and a base for exploiting the abundant sea otters in the region. To that end, a large party of Russians and Aleuts sailed for California where they established Fort Ross (short for Russia) on the coast north of San Francisco.
Fort Ross, though, proved unable to fulfill either of its expected functions for very long. By the 1820s, the once plentiful sea otters in the region had been hunted almost to extinction. Likewise, the colonists’ attempts at farming proved disappointing, because the cool foggy summers along the coast made it difficult to grow the desired fruits and grains. Potatoes thrived, but they could be grown just as easily in Alaska.
At the same time, the Russians were increasingly coming into conflict with the Mexicans and the growing numbers of Americans settling in the region. Disappointed with the commercial potential of the Fort Ross settlement and realizing they had no realistic chance of making a political claim for the region, the Russians decided to sell out. After making unsuccessful attempts to interest both the British and Mexicans in the fort, the Russians finally found a buyer in John Sutter. An American emigrant to California, Sutter bought Fort Ross in 1841 with an unsecured note for $30,000 that he never paid. He cannibalized the fort to provide supplies for his colony in the Sacramento Valley where, seven years later, a chance discovery ignited the California Gold Rush."