Castaic Lake, and can store energy by pumping water in the reverse direction when desired. It is the deepest lake in the California Water Project system. Its name comes from the Pyramid Rock, created when a ridge was cut through in 1932 by the Ridge Route Alternate (US 99). Pyramid Rock still exists directly in front of the dam. Recreation Pyramid Lake offers boating, fishing, jet skiing, and picnic areas (including 5 unique sites that are accessible only by boat), and courtesy docks. Vista del Lago Visitors Center overlooks the lake. Access is from exiting Interstate 5 at Vista Del Lago Road (Exit 191). Fishing is allowed from every location at Pyramid Lake. One can catch fish such as large mouth bass, small mouth bass, striped bass, blue gill, crappie, and some trout. The California Office of Environmental Health Hazard Assessment (OEHHA) has developed a safe eating advisory for fish caught in Piru Creek based on levels of mercury or PCBs found in local species. See also List of dams and reservoirs in California List of lakes in California References External links CA Dept. of Water Resources—DWR: Pyramid Lake Recreation website Pyramid Lake Los Alamos campground info and reservation site Reservoirs in Los Angeles County, California California State Water Project San Emigdio Mountains Reservoirs in California U.S. Route 99 Reservoirs in Southern California Artificial lakes of the United States 1972 establishments in California