Nearest Town: Cassopolis
Surface Area: 1,020 acres
Max Depth: 64ft
Water Clarity: Clear
Distance to O’Donnell’s: 7 miles
Diamond Lake lies about 1 mile southeast of the city of Cassopolis. Diamond Lake is natural, having been formed during the Wisconsinan glacial stage somewhere between 10,000 to 75,000 years ago. The lake drains to Christiana Creek which flows south to the St. Joseph River of Lake Michigan.
Diamond Lake is a popular recreational lake. The entire shoreline of the lake and Diamond Island are lined with cottages and homes, except the wetland area near the outlet.
Diamond Lake is 1,020 acres in size and up to 64 feet deep. Diamond Island (43.1 acres) is found in the center of the lake. Shoal areas (less than 20 feet deep) account for about 68% of the surface area of the lake.
Diamond Lake has one marina, and a public boat launch that can accommodate up to 60 vehicles with trailers. During summer months, lake activity is very high, and there have been some complaints from anglers regarding boat traffic.