South Clear Lake is located at the northern end of the chain, north of Brush Trail, and straddles the Indiana-Michigan state border. The lake is surrounded by agricultural fields, woodlands, and residential properties.
This 62-acre lake, consisting of open water, submergent marsh, and floating islands, is understood to be spring-fed from land on the west side. So far, 63 native plant species have been documented, eight of which are state endangered or threatened. Sandhill cranes (Antigone canadensis) and Canada geese (Branta canadensis) have nested here for many years, while wood ducks (Aix sponsa) and other waterfowl have also been seen in open-water areas during spring and fall migration. White-tailed deer (Odocoileus virginianus) roam the forests that surround the lake, which has areas densely covered by emergent aquatic vegetation, including spatterdock (Nuphar advena). Cricket frogs (Acris crepitans) and green frogs (Lithobates clamitans) along with bullfrogs (Lithobates catesbeianus) can also be heard, especially after sunset.
There is currently no public access. A more comprehensive ecological survey is needed to fully document plants and animals present and understand the environment of this lake.