09011 - Flynn Lake Study Area

The Flynn Lake Study Area encompasses 5,951 acres of rolling lowland terrain within the Chequamegon-Nicolet National Forest in northern Wisconsin. Flynn Lake itself, at 1,204 feet elevation, anchors the landscape as a major hydrological feature, with its headwaters and the East Fork White River drainage system defining water movement through the area. The Pike Chain of Lakes and extensive peatlands create a mosaic of aquatic and semi-aquatic habitats across the Hayward Stagnation Moraines, a glacial landform that shapes both topography and water retention throughout the study area.

Five distinct forest communities occupy different positions across this landscape. Northern Hardwood Forest dominates the upland slopes, while Aspen-Birch Forest occupies areas of intermediate moisture and disturbance history. Upland Mixed Conifer-Deciduous Forest transitions these communities on north-facing aspects and higher elevations, where balsam fir (Abies balsamea) and tamarack (Larix laricina) become increasingly prominent. Northern Wet-Mesic Forest occupies the transition zone between upland and wetland, characterized by mapleleaf viburnum (Viburnum acerifolium) and Canadian bunchberry (Cornus canadensis) in the understory. Open Bog represents the wettest portions of the area, where tamarack and leatherleaf (Chamaedaphne calyculata) dominate a specialized plant community that includes purple pitcher plant (Sarracenia purpurea), round-leaved sundew (Drosera rotundifolia), tuberous grasspink (Calopogon tuberosus), swamp laurel (Kalmia polifolia), and wild rosemary (Andromeda polifolia)—carnivorous and acid-loving species adapted to nutrient-poor peat soils.

The area supports a distinctive assemblage of wildlife shaped by its forest diversity and wetland complexity. The federally endangered gray wolf (Canis lupus) and threatened Canada lynx (Lynx canadensis) occupy the larger landscape as apex predators, while the federally endangered northern long-eared bat (Myotis septentrionalis) hunts insects above the forest canopy and in forest gaps. Brook trout (Salvelinus fontinalis) inhabit the cold-water streams draining the area, while salamander mussel (Simpsonaias ambigua), proposed for federal endangered status, depends on these same waterways. Wetland-dependent species include trumpeter swan (Cygnus buccinator) on open water and the experimental population of whooping crane (Grus americana) that uses the peatlands and shallow lakes. Monarch butterfly (Danaus plexippus), proposed for federal threatened status, relies on milkweed and other nectar plants throughout the area's open and semi-open habitats. American marten (Martes americana), a forest carnivore, moves through the conifer-dominated stands, while blue-spotted salamander (Ambystoma laterale) and red-bellied snake (Storeria occipitomaculata) occupy the moist forest floor and wetland margins.

Walking through the Flynn Lake Study Area, a visitor experiences distinct ecological transitions. Following a trail from upland hardwood forest, the canopy gradually shifts as elevation drops and moisture increases—hardwoods giving way to mixed conifers, then to the open structure of bog forest where tamarack stands thin and light reaches the sphagnum layer below. The sound of water becomes more present as you approach the peatlands, where the ground itself becomes spongy underfoot. Crossing from the dark interior of a balsam fir stand into an open bog, the landscape opens dramatically—the sky suddenly visible, the air cooler and more humid, the understory dominated by low shrubs and carnivorous plants. The presence of whooping cranes or trumpeter swans on Flynn Lake or the Pike Chain represents the culmination of this hydrological and ecological gradient: water that originates in the upland forests concentrates here, creating the shallow, productive wetlands these species require.

The Ojibwe (Chippewa) people are the primary historical inhabitants of this region, having migrated to northern Wisconsin specifically in search of wild rice, "the land where food grows on water." Following a great westward migration, the Ojibwe established a major spiritual and economic center on Madeline Island in Chequamegon Bay approximately 400 years ago. The Ojibwe are part of a long-standing alliance known as the Council of Three Fires, which also includes the Potawatomi and Odawa nations. Prior to the mid-18th century, the Dakota also inhabited and used portions of northern Wisconsin. A period of conflict between the Ojibwe and Dakota occurred from the 1730s through the 1850s as the Ojibwe expanded inland from Lake Superior. The Menominee Nation also has deep ancestral ties to the lands now comprising the Chequamegon-Nicolet National Forest, with documented culturally significant sites protected within the forest boundaries. The Ojibwe and Menominee tribes reserved the right to hunt, fish, and gather on these lands through treaties, rights that remain court-affirmed and active today. Historical use included spear-fishing at night using birchbark canoes and torches, and the forest served as a storehouse for traditional medicines, maple sugar and syrup, firewood, and materials for basketry such as birch bark.

The region was dominated by large lumber companies that established temporary logging camps, which moved once local timber was exhausted. The area was originally dominated by white pine, the primary target for early timber harvests. During the peak logging years, the region was crisscrossed by tote roads—narrow paths for oxen and horse-drawn sleds—and temporary logging railroads used to transport timber to nearby waterways or mills. Following the removal of merchantable timber, the slash left behind often fueled intense forest fires. In the early 1900s, following the timber boom, the land was promoted to European immigrants for farming.

The federal government acquired the lands making up the Flynn Lake Study Area in the 1930s from cutover and abandoned farm tracts. The Chequamegon National Forest was established through a series of legislative acts and presidential proclamations in the early twentieth century. The Weeks Act of 1911, as amended, provided federal authority to purchase lands for the purpose of protecting navigable streams. In 1925, the Wisconsin legislature passed an Enabling Act granting the federal government permission to acquire and manage lands in the state as National Forests. On March 2, 1933, President Franklin D. Roosevelt issued a proclamation collectively naming several purchase units as the Nicolet National Forest. The forest grew from approximately 409,000 acres in 1929 to over 1.5 million acres as the federal government continued to purchase tax-delinquent and cut-over timberlands. In 1952, President Harry S. Truman enlarged both the Nicolet and Chequamegon National Forests by adding lands acquired under the Bankhead-Jones Farm Tenant Act and the Weeks Act.

In the 1930s, the Civilian Conservation Corps built fire towers, fire lanes, and early forest roads in the surrounding district to facilitate reforestation and fire protection. The current forest cover is largely the result of massive replanting efforts by the CCC in that era. Most of the trees in the area are even-aged second-growth forest resulting from this period.

The Flynn Lake Study Area is a 5,951-acre Inventoried Roadless Area protected under the 2001 Roadless Area Conservation Rule and managed within the Washburn Ranger District of the Chequamegon-Nicolet National Forest. The U.S. Forest Service currently consults with eleven federally recognized Ojibwe tribes regarding management of these lands, including the Bad River Band, Lac Courte Oreilles Band, Red Cliff Band, St. Croix Chippewa Indians, and Lac du Flambeau Band of Lake Superior Chippewa. These tribes retain treaty-guaranteed rights to hunt, fish, and gather within the National Forest.

Vital Resources Protected

Headwater Protection for Cold-Water Fish and Migratory Waterfowl

Flynn Lake and the East Fork White River originate within this roadless area, making it the hydrological foundation for the Pike Chain of Lakes downstream. The northern hardwood and aspen-birch forests that dominate the uplands intercept precipitation and regulate streamflow, maintaining the cool, stable water temperatures that support cold-water fish species dependent on these headwaters. Road construction in headwater zones removes the forest canopy that shades streams, causing water temperature to rise—a direct threat to temperature-sensitive species and to the spawning and rearing habitat of fish populations that support both ecological integrity and regional fisheries.

Bog and Peatland Hydrological Integrity

The open bogs and peatlands within this area function as natural water storage and filtration systems, slowly releasing water to downstream drainages and maintaining baseflow during dry periods. These wetlands are hydrologically connected to the broader drainage network through shallow groundwater and surface flow; road construction requires fill material and drainage modifications that disrupt these connections, causing localized water table drawdown and altering the seasonal inundation patterns that sustain bog-dependent plant communities and the salamander mussel (Simpsonaias ambigua, proposed endangered), which depends on stable, clean-water conditions in connected wetland-stream systems.

Interior Forest Habitat for Carnivores and Specialized Bat Species

The unfragmented northern hardwood and mixed conifer-deciduous forests provide interior habitat—forest far enough from edges to avoid the temperature, humidity, and predation pressures that increase toward road corridors—essential for gray wolves (Canis lupus, federally endangered) and Canada lynx (Lynx canadensis, federally threatened), both of which require large, continuous territories with minimal human disturbance. The northern long-eared bat (Myotis septentrionalis, federally endangered) roosts and forages in mature forest canopy; roads fragment this habitat into smaller patches, isolating bat populations and reducing the connected foraging landscape these species need to sustain populations across the region.

Monarch Butterfly Migration Corridor and Native Wildflower Habitat

The open bog and mixed forest mosaic provides nectar and host plants for monarch butterflies (Danaus plexippus, proposed threatened) during spring and fall migration, when energy reserves are critical for survival. Fassett's locoweed (Oxytropis campestris var. chartacea, federally threatened), a rare plant endemic to northern Wisconsin, occurs in this area's specialized bog and upland transition zones; road construction introduces soil disturbance and invasive species that outcompete native wildflowers, directly reducing the floral resources monarchs depend on and eliminating habitat for this threatened plant species.

Threats from Road Construction

Stream Sedimentation and Spawning Habitat Loss

Road construction on rolling terrain requires cut slopes and fill placement that expose mineral soil to erosion; rainfall and snowmelt transport this sediment into headwater streams and downstream drainages, smothering the clean gravel spawning substrate that cold-water fish species require for reproduction. In lowland areas with high water tables like this landscape, even modest road grades generate chronic erosion from roadside ditches and culverts, creating a persistent sediment source that degrades water clarity and fills interstitial spaces in stream gravels—making spawning habitat unsuitable for years or decades after construction ceases.

Canopy Removal and Stream Temperature Increase

Road corridors require clearing of the forest canopy to accommodate pavement, shoulders, and sight lines; this removal eliminates the shade that keeps headwater streams cool. In a landscape where Flynn Lake headwaters originate within the roadless area, canopy loss directly increases water temperature in the streams feeding the lake and downstream Pike Chain, warming water beyond the tolerance of cold-water fish and reducing dissolved oxygen—effects that persist as long as the road exists and the forest canopy remains fragmented.

Habitat Fragmentation and Isolation of Carnivore Populations

Road construction divides the continuous interior forest into smaller, isolated patches separated by the road corridor itself and the edge habitat (increased light, temperature, and predation pressure) that extends into forest on both sides of the pavement. Gray wolves and Canada lynx require large, unbroken territories to hunt and den; fragmentation reduces the effective habitat available to each individual and isolates populations on either side of the road, preventing genetic exchange and increasing vulnerability to local extinction. The northern long-eared bat's foraging range is similarly constrained by fragmentation, as roads create barriers to movement between roosting and feeding areas.

Invasive Species Establishment and Native Plant Displacement

Road construction creates disturbed soil and a linear corridor of altered light and moisture conditions that invasive plants exploit; seeds of non-native species spread along road edges and into adjacent forest via vehicle traffic and road maintenance activities. In this landscape's specialized bog and upland transition zones where Fassett's locoweed and monarch nectar plants occur, invasive species outcompete native wildflowers for space and nutrients, directly reducing habitat quality for the threatened locoweed and eliminating the floral resources monarchs depend on during migration—impacts that are difficult to reverse because invasive species persist and spread even after road maintenance ceases.

The Flynn Lake Study Area encompasses 5,951 acres of rolling lowland forest in the Chequamegon-Nicolet National Forest, featuring northern hardwood, aspen-birch, and mixed conifer-deciduous ecosystems interspersed with open bog and wet-mesic forest. The area's roadless character—maintained through the absence of interior roads—defines the recreation experience here: quiet trails, undisturbed watersheds, and wildlife habitat fragmented only by foot traffic and water access.

Hiking and Backpacking

The North Country National Scenic Trail (NCNST) passes through the study area for 13.6 miles on native material surface, offering foot travel through forest and along the boundary of the adjacent Rainbow Lake Wilderness. The trail connects to the 4,600-mile NCNST system stretching from North Dakota to Vermont. The Bear Paw Trail (510) provides an additional 12.1 miles of hiking on native material surface. Access to both trails begins at the NCT/FH35 Trailhead. Perch Lake Campground serves as a base for extended trips. Dispersed camping is permitted throughout the roadless area at least 100 feet from trails and water sources. The roadless condition preserves the quiet, undisturbed forest character essential to backcountry hiking; motorized vehicles are prohibited, and the absence of interior roads means all access is by foot.

Hunting

White-tailed deer and black bear are present and hunted within the study area under standard Wisconsin seasons, including the nine-day gun deer season in late November. Ruffed grouse and American woodcock inhabit young aspen and alder stands managed specifically for upland bird hunting. Gray squirrel, eastern cottontail, and snowshoe hare are abundant in highland areas. Waterfowl—including Canada and snow geese—use Flynn Lake and associated wetlands. Hunters must access the interior on foot; motorized vehicles are prohibited behind berms, gates, or rocks. Permanent tree stands are not allowed; portable stands may be used if removed daily or per seasonal permit and fastened without nails or wire that damages live trees. Hunting is prohibited within 150 yards of developed recreation sites. The roadless condition ensures the deep-woods hunting experience documented here—access by foot only, no motorized traffic, and intact habitat for game species dependent on unfragmented forest.

Fishing

Flynn Lake, a 30-acre shallow seepage lake, supports muskellunge, walleye, largemouth bass, and northern pike. The lake is part of the Pike Chain of Lakes, which drains into the East Fork White River—a well-known trout stream supporting brook trout, smallmouth bass, largemouth bass, catfish, and walleye. Walleye are stocked at approximately 10 fish per acre in odd-numbered years; great lakes spotted muskellunge have been stocked in alternate years since 2022. For Flynn Lake, Eagle Lake, and McCarry Lake combined, the hook and line season runs from the first Saturday in May to the first Sunday in March. Walleye daily bag limit is 3 in total, with a protected slot prohibiting possession of fish between 14 and 18 inches except one fish may exceed 18 inches. Muskellunge season opens the first Saturday in May. Trout in the East Fork White River follow a season from the first Saturday in May through September 30, with a daily bag limit of 5. Flynn Lake is accessed by water through Eagle Lake; the entire Pike Chain is designated an Outstanding Resource Waterway. The lake's diverse aquatic plant community provides critical fish habitat but makes navigation challenging in shallow, weed-heavy waters. Access to Flynn Lake remains non-motorized once away from developed landings on the main chain, preserving the quiet water conditions and intact watershed that support this fishery.

Birding

The study area's forest habitats support black-capped chickadee, ruffed grouse, broad-winged hawk, barred owl, least flycatcher, red-breasted nuthatch, veery, and hermit thrush year-round. Mature conifer stands host blue-headed vireo, golden-crowned kinglet, northern parula, and blackburnian warbler. Young balsam fir and white spruce stands support magnolia warbler; mature stands host cape may warbler. Wet brushy areas and tamarack/black spruce bogs support winter wren, northern waterthrush, Canada warbler, yellow-bellied flycatcher, ruby-crowned kinglet, Lincoln's sparrow, and palm warbler. The area is within range for spruce grouse, black-backed woodpecker, Canada jay, and boreal chickadee. Spring migration peaks in mid-to-late May with nashville, yellow-rumped, and black-throated green warblers. Fall migration peaks in early September. Winter may bring irruptions of pine grosbeak, red crossbill, white-winged crossbill, common redpoll, and pine siskin. The roadless condition preserves the interior forest habitat—unbroken by roads and motorized access—that supports breeding populations of neotropical migrants and forest-interior specialists dependent on unfragmented canopy.

Paddling

Flynn Lake is a quiet, remote 30-acre lake suitable for canoes, kayaks, and paddleboards. Maximum depth is nine feet. The lake is classified by the Wisconsin DNR as a "canoe" access waterbody, meaning it is suitable only for lightweight boats. Public water access is available through navigable waterways connecting to the Pike Chain of Lakes. A formerly vehicle-accessible dispersed campsite within the roadless area has been closed to motorized use and converted to non-motorized use, providing a potential landing point for paddlers. The roadless designation ensures the quiet, remote paddling character documented here—no motorized boats, no interior road access, and intact shoreline habitat.

Photography

Flynn Lake and the rolling Hayward Stagnation Moraines provide scenic vistas and water features. The area contains rare botanical species including Fassett's locoweed, purple pitcher plant, round-leaved sundew, tuberous grasspink, swamp laurel, and wild rosemary in bog habitats. Tamarack and balsam fir provide year-round interest. Wildlife subjects include whooping crane (experimental population), gray wolf, northern long-eared bat, Canada lynx, and American marten. Trumpeter swans and black-capped chickadees offer avian subjects. Brook trout, blue-spotted salamander, red-bellied snake, and common garter snake are documented. Monarch butterflies are present. The roadless condition preserves the undisturbed landscape and wildlife behavior—absence of roads and motorized access allows closer approach to wildlife and maintains the natural forest and wetland character essential to scenic and wildlife photography.