Glory Hole of Berryessa Lake

Lake Berryessa is the largest lake in Napa County, California. This reservoir in the Vaca Mountains is formed by the Monticello Dam, which provides water and hydroelectricity to the North Bay region of the San Francisco Bay Area. The reservoir was named for the first European settlers in the Berryessa Valley. Huge drain hole at Lake Berryessa Monticello dam is known as “The Glory Hole”,this strange feature is an open bell-mouth spillway, 72 feet in diameter. The pipe has a straight drop of 200 feet and the diameter shrinks down to about 28 feet. In 1997 a woman was killed after being pulled inside the spillway.

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