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 north east of the San Bernardino city limits. 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.

The San Bernardino Mountains are a high and rugged mountain range in Southern California in the United States. Situated north and northeast of San Bernardino and spanning two California counties, the range tops out at 11,503 feet (3,506 m) at San Gorgonio Mountain – the tallest peak in Southern California. The San Bernardinos form a significant region of wilderness and are popular for hiking and skiing.