| Indiana Dunes State Park | |
|---|---|
![]() Interactive map of Indiana Dunes State Park | |
| Type | State Park; National Natural Landmark |
| Location | Porter County, Indiana, United States |
| Nearest city | Chesterton, Indiana |
| Coordinates | 41°40′N87°02′W / 41.66°N 87.04°W / 41.66; -87.04 |
| Area | 2,182 acres (883 ha) |
| Created | 1925 |
| Operated by | Indiana Department of Natural Resources |
| Visitors | 1,367,194 (in 2018–2019)[1] |
| Status | Open all year |
| Website | Official Website |
Indiana Dunes State Park is an Indiana State Park located in Porter County, Indiana, United States, 47 miles (75.6 km) east of Chicago. The park is bounded by Lake Michigan to the northwest and is surrounded by as well as within the authorized boundaries of Indiana Dunes National Park, a unit of the National Park Service; the NPS owns the water from the ordinary high water mark to 300 feet (91 m) offshore.[2] The 1,530-acre (619.2 ha) Dunes Nature Preserve makes up the bulk of eastern part of the park, and includes most of the park's hiking trails and dune landscape. This was one of the first places Richard Lieber considered when establishing the Indiana State Park system. Like all Indiana state parks, there is a fee for entrance. Indiana Dunes State Park was established in 1925 and designated a National Natural Landmark in 1974.[3]
Preserving the Indiana Dunes has resulted from the efforts of many citizens and politicians.[4][5] In 2018–2019, Indiana Dunes was the most-visited Indiana state park, with more than 1.3 million visitors.[1]
The beaches were formed by winds coming off Lake Michigan, which drop sand when the wind hits plants, dunes, and hills. As the lake level of Lake Michigan dropped at the end of the Ice Age, the shoreline receded, and new dunes were formed along the lakeshore. Vegetation took over the previous dunes, and eventually forests grew on top of them. There are "blowouts" along the dunes, where dead stumps were revealed after the wind blew away the sand from on top of them; the most notable such blowout is Big Blowout.

Human presences in the Indiana Dunes have existed since the retreat of the glaciers some 14,000 years ago. The southern lakes area was a rich hunting ground and there is little evidence of permanent communities forming during the earlier years. Archeological evidence is consistent with seasonal hunting camps. The earliest evidence for permanent camps is consistent with the Hopewellian occupation of the Ohio valley. Five groups of mounds have been documented in the dunes area. These mounds would be consistent with the period of 200 BCE (Goodall focus) to 800 CE (early Mississippian).[6] The advent of European exploration and trade introduced more changes to the human environment. Tribal animosities and traditional European competition affected tribal relations. Entire populations began moving westward, while others sought to dominate large geographic trading areas. Once again the dunes became a middle point on a journey from the east or the west. It continued to remain a key hunting ground for villages over a wide area. It wasn't until the 19th century that native villages once again were scattered through the area, but this was soon followed by European settlement. Today, the entire coast line has been settled and filled with homes, factories, businesses and public parks.


| Dunes Nature Preserve | |
|---|---|
![]() Interactive map of Dunes Nature Preserve | |
| Designated | 1974 |
The Nature Preserve covers the eastern 2/3 of the state park, 1,530 acres (620 ha). It is accessible only on foot. All eight of the park's trails enter the nature preserve, offering easy to rugged experiences amongst the dunes. The highlights of the preserve include:[7]
Designated a National Natural Landmark in 1974, the preserve also contains the Ancient Pines Nature Area, a prehistoric forest now exposed by dune blowouts.[8]
Blowouts are formed by the on-shore winds of Lake Michigan. The winds move sand and pile it into dunes. As the dunes form, plants begin to take hold, stabilizing the sand. Beach grasses form a large underground system of roots. This root system creates stable areas of sand from which the dune can grow. Slowly other plants take root in the protected areas, including bearberry (kinnikinnick) and small evergreens. Over time, larger plants like sumac, sand cherry, cottonwood, and juniper take hold and replace the grasses and smaller plants.
When a nick forms in this armor of roots and plants, the area can become a blowout. First, open sand becomes accessible to the wind. This can be by animal trails or by human footpaths. A tree could fall in a strong wind, exposing the underlying sand. When this happens, the wind once again works on the loose sand. It undercuts the other roots, and begins moving sand southward. If the winds are strong enough or given enough time, a large blowout can occur, reducing the dunes to lake level over a large area. The three largest blowouts in the park are Beach House, Furnessville, and Big Blowout. Each extends into the interdunes, between the front rises of dunes and pockets, into the interdunal troughs. Big Blowout has uncovered an area of dead tree trunks known as the Tree Graveyard.[9]
The park also has a Youth Tent Area separate from the public campground.