Description
Large glacial erratics left over from the Ice Age can be explored at Madison Boulder Woods. This 240-acre preserve protects the forestlands surrounding the Madison Boulder Natural Area, a designated National Natural Landmark and home to the famous "Madison Boulder" - a huge granite rock measuring 83 feet in length, 23 feet in height above the ground, 37 feet in width, and weighing in at upwards of 5,000 tons.