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Grandma Lake Wetlands State Natural Area
Grandma Lake.jpg
Grandma Lake Wetlands
Grandma Lake Wetlands State Natural Area is located in Wisconsin
Grandma Lake Wetlands State Natural Area
Grandma Lake Wetlands State Natural Area
Location in Wisconsin
Grandma Lake Wetlands State Natural Area is located in the United States
Grandma Lake Wetlands State Natural Area
Grandma Lake Wetlands State Natural Area
Location in the United States
Location Florence, Wisconsin, United States
Area 495 acres (200 ha)
Established 1996

Grandma Lake Wetlands State Natural Area is a Wisconsin Department of Natural Resources-designated State Natural Area featuring the undeveloped, pristine 44-acre Grandma Lake, which lies in a depression formed during the last glacial period. The lake is ringed by a large, open sphagnum bog mat. The bog mat is surrounded by a coniferous swamp of tamarack (Larix laricina) and black spruce (Picea mariana). The bog mat supports a plant community that is considered diverse and unusual, with several rare species present, including: bog arrow-grass (Triglochin maritima), dragon's mouth orchid (Arethusa bulbosa), livid sedge (Carex livida), small-headed bog sedge (Carex tenuiflora), as well as one of only a few known populations of bog rush (Juncus stygius) in the State of Wisconsin. In 1991, the US Forest Service designated the site as a Research Natural Area. Also, the site is listed as one of Wisconsin's Wetland Gems, by the Wisconsin Wetlands Association.

Location and access

Grandma Lake Wetlands is located within the Nicolet National Forest, in southwest Florence County, approximately 3 miles (4.8 km) southeast of Long Lake. Access is via a walking trail that leads west from Grandma Lake Road, approximately 0.5 miles south of its intersection with Tie Mill Road. A small, brown breeding bird survey fencepost marks the trailhead.

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