Moore's Flat was a historic mining town located on the San Juan Ridge about 19 miles northeast of Nevada City, California and about 5 miles northeast of North Bloomfield, California. The town was about 1 mile south of the Middle Yuba at an elevation of about 4200 ft. On either side of it, lay the mining towns of Orleans Flat and Woolsey's Flat, each about I mile apart. All three were settled around 1851 and their histories frequently intertwine. Collectively, they are sometimes referred to as "The Flats." All three were part of Eureka Township.