# Indiana Dunes National Park — the Lake Michigan dunes where the science of ecology began Canonical: https://sockmonkey.com/places/indiana-dunes-national-park (this is a plain-text copy of that page) Source: https://sockmonkey.com/places/indiana-dunes-national-park Publisher: SockMonkey.com (https://sockmonkey.com) Part of: The Field Guide - https://sockmonkey.com/places/ Cite as: SockMonkey.com - sockmonkey.com Last reviewed: 13 November 2026 Part of The US National Parks - **Where:** Southern shore of Lake Michigan, north-west Indiana - **Coordinates:** 41.63° N, 87.05° W (Indiana Dunes Visitor Center) - **Shore:** 15 miles of Lake Michigan, beaches and dunes - **Size:** 15,349 acres (2021) - **Life:** 1,960 species, the fifth most biodiverse, national park; more than 350 kinds of birds - **Nearest park to:** Chicago, Indianapolis, Detroit and Milwaukee - **Neighbours:** More than 30 million people, within a three-hour drive - **Protected:** National lakeshore 1966, national park 2019 - **Advisory:** United States, (no State Department level) ## The short answer Indiana Dunes National Park runs along 15 miles of Lake Michigan’s southern shore in north-west Indiana, and it is the closest national park to Chicago. Behind the beaches and dunes lie fens, bogs, marshes, prairies, black oak savannas and woods. Trains on the South Shore commuter line stop inside the park, and it has been a national park since 2019, after more than fifty years as a national lakeshore. ## Why it's worth knowing Where ecology took root. In the 1890s a University of Chicago botanist, Henry Chandler Cowles, brought his students to these dunes and showed them that the plants change in a predictable order inland from the water, from marram grass on the bare beach sand to shrubs and pines and at last an oak wood. That process, plant succession, is the reason lawns need mowing. His 1899 study of the dune vegetation made him known as the “father of plant ecology” in North America and made the dunes famous among scientists around the world. The whole story can still be walked. Marram grass thrives on being buried by blowing sand, and the roots of a single plant may spread 20 feet in every direction, holding the foredune together. Behind it, sheltered from the wind, new plant communities take hold, until the bare sand becomes an oak-covered dune. Only a few thousand years ago the shoreline was a mile inland, south of what is now Route 12. More orchids than Hawaii. The park holds more than 1,400 kinds of ferns and flowering plants, among them 28 kinds of native orchid, more than the whole state of Hawaii, and more than 350 kinds of birds have been seen within it. Its black oak savannas, sparse woods of fire-resistant oaks over prairie flowers, are among the last and best in the world: oak savannas once covered about fifty million acres from Michigan to Nebraska and now cover about 30,000. Fire, set on purpose, keeps them open for the wild lupine, the only food of the young Karner blue butterfly. Saved by a schoolteacher. Lovers of the dunes, the landscape architect Jens Jensen among them, formed the Prairie Club of Chicago in 1908, and in October 1916, weeks after the National Park Service was created, its first director held hearings in Chicago on a “Sand Dunes National Park”. Four hundred people came, 42 spoke in favour, and nobody spoke against. Then the First World War intervened, and the slogan “Save the Dunes!” became “First Save the Country, Then Save the Dunes!”. In 1952 Dorothy Buell, an English teacher from Ogden Dunes, helped found the Save the Dunes Council, which bought land and lobbied for it alongside Senator Paul Douglas until Congress finally authorized the lakeshore in 1966. The visitor center is named for her. ## The field notes ### The last of the Central Dunes The Central Dunes were the place the Save the Dunes campaigners most wanted to protect, and they were lost: the land was cleared for the Port of Indiana and a steel works. In the winter of 1962, as the bulldozers went in, Dorothy Buell remembered Senator Douglas standing beside her with tears running down his cheeks. John Hawkinson, an artist and Boy Scout leader who wrote and illustrated children’s nature books with his wife, was the last to sell his land there. By holding on until the end, he helped persuade the steel company not to oppose the national lakeshore. ### Saturday afternoon walks In 1910 the Chicago writer Lois Willoughby described a “Saturday Afternoon Walk” through Miller Woods, one of the outings of a walking club whose members included the landscape architect Jens Jensen. Those walks grew into the Prairie Club and the first efforts to protect the dunes. The Paul H. Douglas Trail through Miller Woods now follows the same haunts, through some of the finest black oak savanna that remains. ### Ice on the shore In a hard winter, breaking waves and spray freeze along the beach into mounds and ledges of shelf ice that can look like solid ground running out into the lake. It is anything but: shelf ice builds outward from the beach without freezing to the lake bottom, and it is full of hidden cracks and holes that can give way like a trapdoor. The Park Service warns never to step onto it. ### Ten thousand years of footprints More than 225 archaeological sites in the park record 10,000 years of Native American life, the fur trade and later Swedish immigration. The Bailly Homestead is a National Historic Landmark, and more than 50 structures in the park are on, or eligible for, the National Register of Historic Places. **A relic from Indiana Dunes National Park** A wild lupine on a black oak savanna. In the open, grassy places where fire-resistant black oaks stand scattered among the prairie flowers, the lupine is the only food of the young Karner blue butterfly, a federally endangered species. Once, fires set by lightning or by Native Americans kept these savannas open; now prescribed fire and careful clearing do the job, so the lupine, and the little blue butterfly, can go on. ## Getting there How to get there. The Indiana Dunes Visitor Center is at 1215 North State Road 49, in Porter: a mile north of exit 26 on Interstate 94, and four miles north of exit 31 on the Indiana Toll Road (Interstates 80/90). Most of the park’s beaches and trails are reached from US Highway 12. Trains on the South Shore line, which runs to Chicago, stop inside the park at Miller, Ogden Dunes, Dune Park and Beverly Shores. The nearest airports are Gary, South Bend, and Chicago’s Midway and O’Hare. When to go. Lake Michigan shapes the weather. Summers are warm and humid, with highs in the mid-80s°F and about 15 days a year above 90°F; winters are usually cloudy, with highs in the low to mid 30s°F and about 15 days a year below 0°F. What to arrange ahead. As of 13 November 2026, the national park charges an entrance fee, and its passes are not accepted at Indiana Dunes State Park, nor the state park’s at the national park. The park is open from 6 am to 11 pm Central Time; West Beach closes at 9 pm. Safety. The State Department’s travel advisories cover other countries, so none applies here. The park’s conditions and alerts pages carry current closures. ## Common questions #### Why is Indiana Dunes important to science? Because ecology took root there. In the 1890s Henry Chandler Cowles studied how plants change from the beach to the woods on the dunes now in Indiana Dunes National Park, and his work helped establish ecology as a science. #### How close is Indiana Dunes to Chicago? Close enough to reach by commuter train. Indiana Dunes National Park is the nearest national park to Chicago, and South Shore line trains stop inside it at Miller, Ogden Dunes, Dune Park and Beverly Shores. #### When did Indiana Dunes become a national park? In 2019, after half a century as a lakeshore. Congress authorized the Indiana Dunes National Lakeshore on November 5, 1966, and renamed it Indiana Dunes National Park, the 61st, on February 15, 2019. #### What was Hoosier Slide? The largest sand dune on Indiana’s lakeshore, now gone. Hoosier Slide stood 200 feet high until a glass fruit-jar maker and a plate-glass company carried it away in railroad boxcars, which helped spur the campaign that led to Indiana Dunes National Park. #### What is shelf ice? Frozen waves and spray piled along the shore. At Indiana Dunes National Park shelf ice forms on Lake Michigan in winter; it is not frozen to the lake bottom and is full of hidden holes, and the Park Service warns never to step onto it. #### How many kinds of orchid grow at Indiana Dunes? Twenty-eight, more than in the whole of Hawaii. Indiana Dunes National Park also holds more than 1,400 kinds of ferns and flowering plants, which makes it the fifth most biodiverse national park. #### What is the Karner blue butterfly? A small, federally endangered butterfly of the oak savannas. At Indiana Dunes National Park its young feed only on wild lupine, and controlled burns at Miller Woods and Tolleston Dunes keep the savanna open for both. What to pack: the Road trips kit ## Related places Gateway Arch National Parkalso in The US National Parks · about 430 km away New River Gorge National Park and Preservealso in The US National Parks · about 650 km away Isle Royalealso in The US National Parks · about 720 km away Shenandoah National Parkalso in The US National Parks · same region Congaree National Parkalso in The US National Parks · same region Notes on sources. Indiana Dunes National Park is in the United States, so no State Department advisory applies. The National Park Service’s pages for the park, read directly on 13 November 2026, supplied: the dates of 1966 and 2019, the 61st park, the nearest-park claim, the 30 million people, the train stops, the 15,349 acres, the 15 miles, the biodiversity figures, orchids, birds, archaeological sites, the Bailly Homestead, the historic structures, the entrance fee and passes, the hours, and the visitor center’s address (questions page, updated 24 March 2022); Cowles, plant succession, marram grass and the shoreline a mile inland (plant succession, updated 28 August 2024; plant succession video, updated 29 August 2022); Cowles’s 1899 article, Hoosier Slide, the Prairie Club, the 1916 hearings, the wartime slogan and Dorothy Buell (history and culture, updated 17 June 2026); the oak savannas, the Karner blue and lupine, and the restoration (black oak savannas, updated 26 February 2020); Hawkinson and the Central Dunes, and Senator Douglas in 1962 (Hawk’s Island, updated 19 July 2023; history and culture); Lois Willoughby’s walks (Willoughby 1910, updated 18 September 2023); shelf ice (shelf ice, updated 23 August 2024); the exits, US 12 and airports (directions, updated 23 August 2024); and the weather (weather, updated 27 August 2024). The coordinates are the Indiana Dunes Visitor Center, from the park’s linked data. Checked 13 November 2026. Written and fact-checked by SockMonkey.com. Last reviewed 13 November 2026.