Lake Koshkonong

Lake Koshkonong is a reservoir in Wisconsin created by damming the Rock River, forming a broad and shallow body of water. The lake is surrounded by marshes and wetlands that support varied fish populations.

The reservoir was created in 1932 when a dam was built across the river, transforming swampy terrain into a lake. This project reshaped the land and created new habitat for aquatic life.

The name comes from Native American language and reflects the region's original inhabitants. Today the lake draws people interested in nature and wildlife, who come to observe and appreciate the landscape.

The lake has several public boat ramps located around its shore for access. Water conditions vary by season, so visitors should plan accordingly and check local conditions before visiting.

The lake is home to uncommon bird species that are difficult to spot in other parts of the region, particularly in its surrounding wetlands. These populations have adapted to the shallow water and marsh conditions specific to this location.

Location: Jefferson County

GPS coordinates: 42.87417,-88.95806

Latest update: December 7, 2025 20:50