Alta Sierra (Spanish for "Upper Range") is a census-designated place (CDP) in Nevada County, California, United States. The population was 6,911 at the 2010 census, up from 6,522 at the 2000 census.
Alta Sierra (Spanish for "Upper Range") is a census-designated place (CDP) in Nevada County, !California, United States. The population was 6,911 at the 2010 census, up from 6,522 at the 2000 census.