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 eponymous Lake Arrowhead Reservoir. Lake Arrowhead is located 13 miles (21 km) north east of the San Bernardino city limits. The population of the CDP was estimated at 12,401 in the 2020 census. It was 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.