Lake McClure is a reservoir in the Sierra Nevada foothills of western Mariposa County, California, United States.

The California Office of Environmental Health Hazard Assessment (OEHHA) has developed a safe eating advisory for Lake McClure based on levels of mercury found in fish caught from this water body[1] The lake was first created by the original Exchequer Dam, built between 1924 and 1926, a concrete gravity arch dam.

It is a rock-fill dam with a reinforced concrete face, owned by the local Merced Irrigation District, which supplies northern Merced County farms with water for irrigation through its approximately 800-mile (1200 km) network of canals.

Hang gliding is popular at Lake McClure, and the site is reportedly soarable 320 days of the year.

The California Office of Environmental Health Hazard Assessment has issued a safe eating advisory for any fish caught in Lake McSwain due to elevated levels of mercury.