Lake Diane is an over 300 acre all sports lake located in southern Hillsdale County. This large, man-made reservoir was created by the construction of a dam on a tributary to Clear Fork Creek.

Two natural lakes located on the tributary, Goforth and Hagerman, were inundated when the reservoir was created as part of a real estate venture in 1966.

The Lake Diane community has grown into a thriving community consisting of a mix of full time and part time residents.

The community is fostered by the LDCA which is made up of lakefront or riparian property owners around the lake and are here to advocate for the health, beauty, sustainability, community, and future of Lake Diane.