 Columbia College (California) is about down the hill in Columbia, from Sonora (about from Groveland).According to the United States Census Bureau, the CDP covers an area of 19.3 square miles (49.9 km²), 19.0 square miles (49.1 km²) of it land and 0.3 square miles (0.7 km²) of it (1.46%) water.The 2010 United States Census reported that Pine Mountain Lake had a population of 2,796.