Frentress Lake is a backwater lake located on the eastern side of the Mississippi River in Jo Daviess County in northern Illinois, to the southeast of East Dubuque.
History Homes on Frentress Lake experienced flooding in April 2011.
In 2017, a plane crashed near the marina in Frentress Lake.
In 2025, work began on U.S. Route 20 which made access to Frentress Lake easier.
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