Miller Woods

Miller Woods is a trail system in the far western part of the Indiana Dunes National Lakeshore Park, in the lakefront community of Miller Beach, Indiana. Miller Woods is home to the federally endangered Karner Blue butterfly and the federally threatened Pitcher's thistle. Miller Woods is also the only part of the National Lakeshore that also adjoins the Grand Calumet River.

The northern part of Miller Woods adjoins Lake Michigan, and includes foredunes and high dunes, as well as blowouts and pannes. The southern and larger part of Miller Woods consists of rolling dune and swale, with dune ridges dominated by oak savanna. This southern part is also traversed by current and former rail lines. The northern and southern parts are divided by the Grand Calumet River, including the westernmost of the three lagoons that mark the river's modern-day headwaters and former mouth.

Miller Woods was the site of some of Henry Chandler Cowles' earliest observations on ecological succession in the late 19th century. Subsequently, it was acquired by US Steel for industrial use, and a number of railroads and spur lines were laid through the area. This had an unintended beneficial impact for the local oak savanna ecology; the sparks thrown off by passing trains maintained the fire cycle that was suppressed in most other parts of the Indiana Dunes during the 20th century.

The area was acquired by the National Park Service through an expansion bill passed in 1976. The bill was passed in honor of Senator Paul Douglas, who was then on his deathbed, and the Douglas name was applied to the large environmental education center that now stands at the entrance to Miller Woods.

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