what city is pine grove?
 Pine Grove is a census-designated place in Amador County, California. It lies at an elevation of 2513 feet. The population was 2,219 at the 2010 census. It is located at 38°24′47″N 120°39′32″W / 38.41306°N 120.65889°W / 38.41306; -120.65889, along State Route 88. 