Lake San Antonio

Infobox lake
lake_name = Lake San Antonio
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location = Monterey County, California
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type = reservoir
inflow = San Antonio River
outflow = San Antonio River
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basin_countries = United States
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Lake San Antonio is a lake in southern Monterey County, California. The lake is formed by an earthfill dam on the San Antonio River. The dam is 202 feet (62 m) tall and was completed in 1965. The lake and dam are owned by the Monterey County Water Authority. The lake has a capacity of 335,000 acre feet (413,000,000 m³)

Lake San Antonio's primary purpose is to provide groundwater. Without the lake, the river would be nearly dry in the summer months. With water in the river year-round, more of it can seep into the ground. Boating, skiing, fishing and camping are popular recreational activities at the lake, particularly in the summer. However, it receives fewer visitors than Lake Nacimiento, several miles to the south. Lake San Antonio has over 500 campsites. Deer frequent the campsites, even lounging around during daylight hours near campsites. Other wildlife that may be spotted include bears, snakes, and wild pigs. Eagles frequent the lake and tours are offered during select months. The North shore offers campsites on the shore where you can leave your boat moored in the water rather than launching it every day.