About 80 miles due east of the hustle, bustle, and high prices of Napa is one of California's lesser known and lightly visited wine regions. Amador County is part of the larger Sierra Foothills wine region. Within Amador is the central wine hub of Shenandoah Valley that you enter from the town of Plymouth (pop. 1,100, founded in 1852 as a mining camp). In some ways, you are entering Napa Valley 40 years ago.