Reclamation Information Sharing Environment (RISE)

Lake Arrowhead and its dam, located in the San Bernardino National Forest in San Bernardino County, are on Little Bear Creek about 30 miles northeast of Fontana and about 65 miles northeast of Los Angeles in southern California. Lake Arrowhead was formally known as Lake Little Bear with initial development in the 1890’s to provide a diverted water supply for the San Bernardino area. These diversions never materialized and the completed reservoir was renamed Lake Arrowhead, becoming a resort community. The recreational use of the reservoir is controlled by the Arrowhead Lake Association (ALA). The Lake Arrowhead Community Services District (LACSD) withdraws water from the reservoir for treatment and distribution to local residents for potable use.