Long Lake was one of the focus of Diana of the Dunes conservation efforts. Others joined these conservation efforts to preserve the Indiana Dunes. In the 19th century, the ice of Long Lake furnished a livelihood for early inhabitants of the small town of Miller, which later became Miller Beach; ice was harvested from the lake and shipped to market by rail. The ice also provided a surface for ice-skating between Miller and
Baillytown. A recreational fishery also flourished on the lake in the early 20th century, when a more diverse biota was present than today, including
largemouth bass and
yellow perch. In 1920s, the construction of County Line Road separated the western portion of Long Lake from the larger, deeper eastern portion. No culvert connects the two halves; as a result, fish and many aquatic plants are periodically killed off when the western portion dries out during dry summer weather. ==Flora and fauna==