Foster Bar, California
Foster Bar is a former settlement in Yuba County, California. It was located on the North Yuba River southeast of Challenge, at an elevation of 1909 feet. It was inundated by the Bullards Bar Reservoir.
The place was named after William M. Foster, miner and merchant, who opened a store here in 1849. A post office operated at Foster Bar from 1852 to 1866.