| Pinhook Bog National Natural Landmark | |
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| Location | LaPorte County, Indiana, United States |
| Nearest city | Michigan City, Indiana |
| Coordinates | 41°36′54″N 86°50′54″W / 41.61500°N 86.84833°W |
| Area | 25 acres (100,000 m2) |
| Governing body | National Park Service |
| Designated | 1965 |
Pinhook Bog is a unique bog in Indiana that has been designated a National Natural Landmark. It is part of Indiana Dunes National Park, an area that many citizens, scientists, and politicians fought hard to preserve.[1][2][3] Its sister bog, Volo Bog (not to be confused with a bog of the same name in Illinois), is located nearby.[2] The bog contains a large variety of plants, including insect eating plants, tamarack trees, stands of blueberry bushes, and floating mats of sphagnum moss. Pinhook Bog is about 580 acres (2.3 km2), a quarter of which is a floating mat of sphagnum peat moss. A "moat" separates the bog from the uplands.
- ^ Smith, S. & Mark, S. (2006). Alice Gray, Dorothy Buell, and Naomi Svihla: Preservationists of Ogden Dunes. The South Shore Journal, 1. "South Shore Journal - Alice Gray, Dorothy Buell, and Naomi Svihla: Preservationists of Ogden Dunes". Archived from the original on September 13, 2012. Retrieved June 11, 2012.
- ^ a b Smith, S. & Mark, S. (2009). The Historical Roots of the Nature Conservancy in the Northwest Indiana/Chicagoland Region: From Science to Preservation. The South Shore Journal, 3. "South Shore Journal - the Historical Roots of the Nature Conservancy in the Northwest Indiana/Chicagoland Region: From Science to Preservation". Archived from the original on January 1, 2016. Retrieved November 22, 2015.
- ^ Smith, S. & Mark, S. (2007). The cultural impact of a museum in a small community: The Hour Glass of Ogden Dunes. The South Shore Journal, 2. "South Shore Journal - the Cultural Impact of a Museum in a Small Community: The Hour Glass in Ogden Dunes". Archived from the original on November 30, 2012. Retrieved June 11, 2012.