Lake Arrowhead is an unincorporated community and a census-designated place (CDP) in the San Bernardino Mountains of San Bernardino County, California, surrounded by the San Bernardino National Forest, and surrounding the Lake Arrowhead Reservoir. Lake Arrowhead consists of 6 communities including Lake Arrowhead, Twin Peaks, Blue Jay, Cedar Glen, Skyforest, and Rimforest. The population of the CDP was estimated at 12,424 in the 2010 census. It was formerly called "Little Bear Lake", until around 1920, when a group from Los Angeles, the Arrowhead Lake Company, bought the lake and the land surrounding it, and changed its name to Arrowhead Lake.
