Don Pedro Reservoir

Water type: Artificial lake
Continent: North America
Climate: Temperate

Don Pedro Reservoir, also known as Lake Don Pedro, is a reservoir formed by the construction of the Don Pedro Dam across the Tuolumne River in Tuolumne County, California, United States.

The reservoir is located at the foothills of the Sierra Nevada. Communities nearby include Moccasin and La Grange. It is the sixth-largest reservoir in California.

The reservoir inundates about 42 km of the Tuolumne River bed and covers an area of approximately 13,000 hectares (5,300 ha). The 2,030,000 acre⋅ft (2.50 km3) of stored water here originates from a watershed of over 1,500 square miles (3,900 km2).

The California Office of Environmental Health Hazard Assessment has issued safety advice for any fish caught in Don Pedro Reservoir due to elevated levels of mercury, PCBs, and other pollutants.