Indiana Dunes National Park is a United States national park located in northwestern Indiana managed by the National Park Service. It was authorized by Congress in 1966 as the Indiana Dunes National Lakeshore and was redesignated as the nation's 61st national park on February 15, 2019. The park runs for about 20 miles (32 km) along the southern shore of Lake Michigan and covers 15,349 acres (6,212 ha). Along the lakefront, the eastern area is roughly the lake shore south to U.S. 12 or U.S. 20 between Michigan City, Indiana, on the east and the Cleveland-Cliffs steel plant on the west. This area's conservation scheme is enhanced by the older Indiana Dunes State Park. To the west of the steel plant lies West Beach and a small extension south of the steel mill continues west along Salt Creek to Indiana 249. The western area is roughly the shoreline south to U.S. 12 between the Burns Ditch west to Broadway in downtown Gary, Indiana. In addition, there are several outlying areas, including Pinhook Bog, in LaPorte County to the east; the Heron Rookery in Porter County, the center of the park; and the Hoosier Prairie State Nature Preserve and the Hobart Prairie Grove, both in Lake County, the western end of the park.
Miller Beach is a neighborhood of Gary, Indiana on the southernmost shore of Lake Michigan. First settled in 1851, Miller Beach was originally an independent town. However, the "Town of Miller" was eventually annexed by the then flourishing city of Gary in 1918. Located in the northeastern corner of Lake County, Indiana, the former town is now known as "The Miller Beach Community." Miller Beach borders Lake Michigan to the north, Porter County to the east, and is largely surrounded by protected lands, including Indiana Dunes National Park. Miller Beach is also the closest beach/resort community to Chicago, and has been a popular vacation spot since the early 20th century. As of the 2000 US census, it had a population of 9,900.
Thirty-seven species of mammals have been identified at Indiana Dunes National Park. Four other species are thought to inhabit the park, but have not been documented: the northern long-eared myotis, the Indiana bat, the hoary bat, and the southern bog lemming
Marquette Park, originally called Lake Front Park, is a municipal park completely surrounded by Indiana Dunes National Park. Its primary features include 1.4 miles (2.2 km) of Lake Michigan beaches, inland ponds, sand dunes, wetlands, a lagoon, and indigenous oak savanna. The park is located within the Miller Beach community. The park includes the Octave Chanute museum, registered as a National Landmark of Soaring.
The Indiana Dunes comprise ten different habitats. Each provides for a unique combination of plants and animals. The range of the Indiana Dunes varies depending your source. The Indiana Lake Michigan Coastal Program uses the river drainage systems along the shoreline. This expands the area from the areas of lakeshore southward to the edges of the Valparaiso Moraine. This entire region has been dune landscapes since over 114,000 years before present (YBP). Traditionally, the Indiana Dunes area thought of as a narrow area along the shores of Lake Michigan, including the areas of Marquette Park in Gary, Indiana (1920), Indiana Dunes State Park (1926) and Indiana Dunes National Park,. The identified ten habitats can be found in these parks, where they have been preserved, but are also visible throughout the three counties of Northwest Indiana.
The Grand Calumet River is a 13.0-mile-long (20.9 km) river that flows primarily into Lake Michigan. Originating in Miller Beach in Gary, it flows through the cities of Gary, East Chicago and Hammond, as well as Calumet City and Burnham on the Illinois side. The majority of the river's flow drains into Lake Michigan via the Indiana Harbor and Ship Canal, sending about 1,500 cubic feet (42 m3) per second of water into the lake. A smaller part of the flow, at the river's western end, enters the Calumet River, and through the Illinois ultimately drains into the Mississippi River.
