Lake Beulah is an unincorporated community in the town of East Troy, Walworth County, Wisconsin, United States.

"[7] By 1904, the association had improved the lake strengthening the dam, introducing wall eyed pike, and formulating regulations regarding the display of lights on watercraft.

The association successfully managed to get the dam further strengthened with cement in 1909, which allowed for the lake to be maintained at a set height all year round.

[7] By the 1990s, the major issue on the lake was the spread of invasive species, particularly the Eurasian Water Milfoil.

The Rolex Yachtswoman of the Year Award was presented to Stephanie Roble and Annie Haeger in 2015 and 2016, respectively.