Cowles Bog
| Cowles Bog | |
|---|---|
Cowles Bog in the spring with high water | |
| Location | Porter County, Indiana, United States |
| Nearest city | Michigan City, Indiana |
| Coordinates | 41°38′15″N 87°05′32″W / 41.63750°N 87.09222°W |
| Area | Indiana Dunes National Park |
| Established | 1966 |
| Governing body | National Park Service |
| Designated | 1965 |
| Designated | April 29, 2025 |
| Reference no. | 100011750 |
Cowles Bog is a 4,000-year-old wetland complex in Indiana Dunes National Park, near Chesterton, Indiana. It is named for Henry Chandler Cowles who did his pioneering work in ecology and ecological succession here. His work brought international attention to the area which led to efforts to preserve the Indiana Dunes. It was designated a National Natural Landmark in 1965, and was listed on the National Register of Historic Places in 2025. It contains bog, fen, marsh, wet meadow, swamp, and pond habitats.