Near this site, now inundated by the waters of Don Pedro Reservoir, stood the historic town of Jacksonville. It was settled by Julian Smart who planted the first garden and orchard in the spring of 1849. Named for Colonel A.M. Jackson. In 1850 it was the principal river town in the area. It was the gathering center for thousands of miners working the rich bed of the Tuolumne River.

Plaque placed by the State Department of Parks and Recreation in cooperation with the Golden Chain Council of the Mother Load and the 120 Highway Association. November 19, 1971.