The lake is located in Valley Township, just outside of the city of Allegan in Allegan County. This lake of 1500 acres is actually the backwaters of the Kalamazoo River behind the Allegan Dam. The lake is the perfect destination for boaters and fishermen who are looking for a quiet and small lake to fish on. The lake is known for producing a variety of fish including bluegill, catfish, bullhead and northern pike. Although Lake Allegan is an excellent place to catch fish, it is not great for boaters who have larger boats. Many people instead bring smaller speed and fishing boats to Lake Allegan. The reason why large boats are not suited for Lake Allegan is because the lake is shallow.