Spruce Lake Bog

Spruce Lake Bog is a wetland in Fond du Lac County that spans about 140 acres within Kettle Moraine State Forest. The landscape consists of sphagnum moss, specialized plant communities, and supports numerous bird species in its boggy environment.

The bog was recognized as a State Natural Area by the Wisconsin Department of Natural Resources in 1968. Four years later it received National Natural Landmark status in 1973.

The bog draws naturalists and biologists who come to observe rare plants and animals adapted to wetland conditions. Visitors experience how this landscape supports species found nowhere else in the region.

The bog is accessible through marked trails in Kettle Moraine State Forest and easy to reach. Visitors should wear appropriate footwear for wet terrain and expect slow movement since the ground is boggy and uneven.

The bog harbors rare plant species that grow only in highly acidic and nutrient-poor conditions, making it a botanical hotspot. These specialized adaptations allow organisms to thrive under conditions that are inhospitable to most other plants.

Location: Fond du Lac County

GPS coordinates: 43.67010,-88.20100

Latest update: December 9, 2025 20:23