Lake Ivanhoe, also known as Round Pond, has no surface inlets or outlets but drains to Great East Lake through groundwater. The lake has a surface area of 68 acres, a maximum depth of 20 feet, and a mean depth of 12 feet. The lake is surrounded by mostly low-density residential houses and camps and has a private sandy beach at the Lake Ivanhoe Campground. Lake Ivanhoe is a habitat for loons, which the Lake Ivanhoe Association monitors.