LRP - Licenses

LRP - Regulations

LRP - Permits

Recreation - Statewide

Recreation - Trapping

Recreation - Fishing

Recreation - Hunting

Env. Protection - Management

Env. Protection - Emergency

Env. Protection - Resources

To sign up for updates or to access your subscriber preferences, please enter your contact information below.



 
Donate today: make a difference
Join the community of caretakers
Help preserve Wisconsin's State Natural Areas for future generations. Give to the Endangered Resources Fund today!
Donate today: make a difference
Find
a natural area by name.
Locate
a natural area by county.
Explore outdoors
and find places to go.
Use our interactive map
to find natural areas.
Volunteer
and help care for SNAs.
Contact information
For information on State Natural Areas, contact:
Thomas Meyer
Natural areas conservation biologist

Wisconsin State Natural Areas Program Bohn Lake (No. 530)

Bohn Lake

Photo by Thomas A. Meyer

Resource links:

Bohn Lake Master Plan


Overview

Location

Located within the Bohn Lake State Ice Age Trail Area, Waushara County. T19N-R9E, Section 16. 92 acres.

Description

Description

Bohn Lake is a 13-acre, 24-foot deep hard-water seepage lake that is part of a geologically significant tunnel channel. Often part of a larger tunnel valley system, a tunnel channel is a large cavern created by a meltwater river flowing beneath the glacial ice. As a seepage lake, the Bohn Lake shoreline fluctuates anywhere from four to six feet depending on the hydrologic cycle and in some dry years contains little water. In wet years, abundant vegetation grows in distinctive concentric rings around the lake due to its fluctuating nature. Each ring has a different combination of species including numerous sedges, spike rushes, bulrushes, panic grasses, and silverweed. The lake also contains an abundance of floating leaved aquatics such as water-lilies. The uplands, especially those to the north, contain formerly grazed but highly restorable savanna. Many spring-blooming savanna indicators are present including shooting star and puccoon. Other plants include New Jersey tea, lance-leaved ground-cherry, Canadian milk-vetch, round-headed bush-clover, and hoary vervain. Animal life is diverse with birds such as turkey, tree swallow, northern oriole, great-crested flycatcher, eastern wood pewee, chipping sparrow, eastern bluebird, red-eyed vireo, and wood thrush. Numerous invertebrates also use the area and include white-faced pondhawk dragonfly and pearl crescent, red admiral, and banded hairstreak butterflies. Bohn Lake is owned by the DNR and was designated a State Natural Area in 2008.

Access

Driving directions

From the intersection of County FF (Main Street) and County V in Hancock, go east on V 3.8 miles, then south and east on County B 1 mile to a pull-off and trail head on the east side of the road. The Ice Age National Scenic Trail winds through the site.

For hunting or trapping opportunities, please see the hunting and trapping in State Parks page for details.

Ownership

Bohn Lake is owned by:

  • WDNR

Maps

The DNR's state natural areas program is comprised of lands owned by the state, private conservation organizations, municipalities, other governmental agencies, educational institutions and private individuals. While the majority of SNAs are open to the public, access may vary according to individual ownership policies. Public use restrictions may apply due to public safety, or to protect endangered or threatened species or unique natural features. Lands may be temporarily closed due to specific management activities. Users are encouraged to contact the landowner for more specific details.

The data shown on these maps have been obtained from various sources, and are of varying age, reliability, and resolution. The data may contain errors or omissions and should not be interpreted as a legal representation of legal ownership boundaries.

Objectives

Site objectives

Manage the site as an oak opening reserve, as an aquatic reserve, and as an ecological reference area. Natural processes and prescribed understory manipulation (see below) will determine the structure of the savanna. Provide opportunities for research and education on the highest quality native oak openings.

Management approach

The native dominant savanna tree species (primarily oaks) are managed passively. However, some thinning of the canopy, understory manipulation and shrub control via harvest, brushing or fire may be needed to mimic natural disturbance patterns. Augmentation of the ground layer will only add species that historically would have been found on the site, utilizing seeds or plugs from local genetic material; this usually occurs in the early stages of restoration. The mostly passive canopy management and understory manipulation will determine the ecological characteristics of the site. Other allowable activities include control of invasive plants and animals, maintenance of existing facilities, and access to suppress wildfires. Salvage of trees after a major wind event can occur if the volume of woody material inhibits fire prescriptions.

Site-specific considerations

  • Although removal of hazardous trees from over and near trails is an allowed activity, manipulation/removal of vegetation and soil disturbance should be minimized to the extent possible.
  • The lake naturally fluctuates dramatically over decades, and is influenced by ground water withdrawals.

Recreation

Very few State Natural Areas have public facilities, but nearly all are open for a variety of recreational activities as indicated below. Generally, there are no picnic areas, restrooms, or other developments. Parking lots or designated parking areas are noted on individual SNA pages and maps. Trails, if present, are typically undesignated footpaths. If a developed trail is present, it will normally be noted on the SNA map and/or under the "Access" tab. A compass and topographic map or a GPS unit are useful tools for exploring larger, isolated SNAs.

Allowable activities

In general, the activities listed below are allowed on all DNR-owned SNA lands. Exceptions to this list of public uses, such as SNAs closed to hunting, are noted under the "Access" tab above and posted with signs on site.

  • Hiking
  • Fishing
  • Cross country skiing
  • Hunting
  • Trapping

Prohibited activities

  • Camping and campfires
  • Collecting of animals (other than legally harvested species), non-edible fungi, rocks, minerals, fossils, archaeological artifacts, soil, downed wood, or any other natural material, alive or dead. Collecting for scientific research requires a permit issued by the DNR
  • Collecting of plants including seeds, roots or other non-edible parts of herbaceous plants such as wildflowers or grasses
  • Drone use, unless authorized by a SNA research permit
  • Geocaching
  • Horseback riding
  • Rock climbing
  • Vehicles, including bicycles, ATVs, aircraft, and snowmobiles except on trails and roadways designated for their use

For rules governing state-owned SNAs and other state lands, please consult Chapter NR 45 Wis. Admin. Code [exit DNR]

Back to Top

Last revised: Thursday, October 19, 2017