The third largest of the five Great Lakes of North America and the only one lying wholly within the United States. Bordered by the states of Michigan (east and north), Wisconsin (west), Illinois (southwest), and Indiana (southeast), it connects with Lake Huron through the Straits of Mackinac in the north. The lake is 321 miles (517 km) long (north to south); it has a maximum width of 118 miles (190 km) and a drainage basin of about 45,500 square miles (118,000 square km), exclusive of its surface area, which is 22,300 square miles (57,757 square km).