65 sq mi (168 sq km), W Calif., in wooded hills NW of San Francisco. It is the largest freshwater lake entirely within California and is a fishing resort. Mt. Konochti rises nearly 3,000 ft (910 m) on the west shore.
In Clear Lake California (located about 120 miles north of San Francisco and one of the state's best fishing, wildlife and bird watching environments), phosphorus from a variety of sources has accelerated a growing, wide spread presence of foul smelling algae throughout the lake.