Pyramid Lake is a reservoir formed by Pyramid Dam on Piru Creek in the eastern Topatopa Mountains, near Castaic, Southern California. It is a part of the West Branch California Aqueduct, which is a part of the California State Water Project. Its water is fed by the system after being pumped up from the San Joaquin Valley and through the Tehachapi Mountains.
Location: Angeles National Forest / Los Padres National Forest · Los Angeles County, California
Primary inflows: West Branch California Aqueduct · Piru Creek
Primary outflows: West Branch California Aqueduct · Piru Creek
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