In 1841 Johann Sutter purchasing 49,000 acres at the junction of the Feather and Sacramento rivers in 1841. This site dominated three important routes: the inland waterways from San Francisco, the trail to California across the Sierra Nevada and the Oregon-California road.
Sutter now decided to build a frontier trading post. Completed in 1843 Sutter Fort had adobe walls eighteen feet high. The fort had shops, houses, mills and warehouses. He also had blacksmiths, millers, bakers, carpenters, gunsmiths and blanket-makers.
Sutter also established the colony of