Goguac Lake is a 352-acre lake located near Battle Creek in Calhoun County, Michigan, with a maximum depth of 66 feet. The lake features varied bottom structure with sand and marl substrate in shallow areas down to approximately 10 feet, transitioning to pulpy peat in deeper sections. The shoreline is heavily developed with 79% armored by seawalls or riprap, though some natural wetland areas remain, particularly on the southwest side. The lake sits within an urban watershed (58% urban land use) and is heavily utilized by both recreational boaters and anglers due to its proximity to Battle Creek.