Lake Koshkonong is a large, shallow lake located in Jefferson County, Wisconsin. Covering approximately 3,200 acres, it is formed by the Rock River and is known for its diverse wildlife and recreational opportunities. The lake is popular for activities such as fishing, boating, and birdwatching. The lake's shoreline features several parks and residential areas, making it a favored destination for both locals and visitors. Lake Koshkonong is also home to various fish species, including walleye and bluegill, attracting anglers throughout the year. Its scenic beauty and recreational options contribute to its appeal as a natural resource in the region.