Pokerville and Puckerville preceded Plymouth along the old stage road between Fiddletown and Sacramento. When the Plymouth Mine hit rich rock by 1870, a new village named Plymouth rose, adjacent to the mine. Plymouth is home to Amador County Fairgrounds, established in 1938 by the late Harold Colburn and other citizens. Grape growing and wine making began in the county in the early 1850s. Plymouth hosts the oldest planting of Zinfandel grapes in the United States. An agricultural history museum, Shenandoah Valley Museum, resides at the longest-running winery in Amador County, Sobon Estates.