There were several camps called Missouri Bar in Gold Rush times, one of which was located on the North Fork of Yuba River, north of Fosters Bar, between Sucker and Elbow bars. This was sometimes known as Missouri Bar No. 2. It was located in March, 1850, by miners from Missouri. "Stephen Foster mined at Missouri Bar in 1852 (letter dated April 11, 1852) and De Long collected taxes here, March 18, 1855."
- Erwin G. Gudde, 1975
"MISSOURI BAR NO. 2. This bar, the second of this name, is just above Elbow Bar, and forms the northwest corner of this township. It was located in March, 1850, by a company chiefly from Missouri. There were Wesley Mock, Wm. Mock, John Perkin, Moses Allen, Sampson Allen, David Garvin, Johnson, and Garnet. There was once a large camp here, with hotels, stores, and saloons. It is still worked in the summer session by white men."
- Thompson & West, History of Yuba County, 1879