What is Michigan’s deepest inland lake? Torch Lake has an average depth of 111 feet and a maximum ... 154 freshwater fish species can be found in Michigan’s inland lakes. This includes: Walleye; ...

— Torch Lake, Michigan (@4torch) October 23, 2015 The sediments at the bottom of Torch Lake are primarily calcium carbonate (limestone), pulverized when glaciers once sat where the lake now lies.