what city is pine grove
- Pine Grove is a census-designated place[3] in Amador County, California. It lies at an elevation of 2513 feet (766 m). The population was 2,219 at the 2010 census. It is located at 38Â°24â²47â³N 120Â°39â²32â³W / 38.41306Â°N 120.65889Â°W / 38.41306; -120.65889, along State Route 88.