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For information on State Natural Areas, contact:
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Wisconsin State Natural Areas Program Blomberg Lake and Woods (No. 392)

Blomberg Lake and Woods

Photo by Joshua D. Sulman


Overview

Location

Within Amsterdam Sloughs Wildlife Area, Burnett County. T38N-R17W, Sections 3, 4. T39N-R17W, Sections 33, 34. 966 acres.

Description

Description

Located within a sandy glacial plain, Blomberg Lake is a 68-acre bog lake surrounded by a northern wet forest. With a maximum depth of four feet, this shallow lake supports only a few aquatic plants including white and yellow water-lily, and large-leaved pondweed. The surrounding wet forest is dominated by tamarack with red maple, some black spruce, and a shrub layer of speckled alder. The understory varies locally from Labrador-tea to three-seeded sedge to alder. Further from the margin of the lake are many wetland grasses and sedges in the herbaceous layer such as blue-joint grass, drooping wood-reed, bristly sedge, American woolly-fruit sedge, yellow blue-bead-lily, sweet gale, marsh skullcap, and American starflower. Northern mesic (wet) forests are very rare in this region and the best example is in the southwest part of the site. The forest is dominated by sugar maple and red maple with lesser amounts of northern red oak, white oak, basswood, trembling aspen, and birch. The groundlayer has areas of Pennsylvania sedge, round-lobed hepatic, bracken fern, maidenhair fern, black snakeroot, bottlebrush grass, and hairy sweet cicely. Migratory waterfowl often use the lake and surrounding wetlands. Blomberg Lake is owned by the DNR and was designated a State Natural Area in 2003.

Access

Driving directions

From the intersection of Highways 35 and 70 in Siren, go west on 70 3.7 miles, then west and north on County N 2.5 miles, then east on an access trail 0.4 mile and park. Walk east 0.1 mile to the lake.

Ownership

Blomberg Lake and Woods 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 a northern wet forest reserve, an aquatic reserve, and as an ecological reference area. Natural processes will determine the structure of the forest. Provide opportunities for research and education on the highest quality native northern wet forests.

Management approach

The native species are managed passively, which allows nature to determine the ecological characteristics of the site. Exceptions include control of invasive plants and animals, maintenance of existing facilities, and access to suppress fires. Salvage of trees after a major wind event and dredging are not considered compatible with management objectives.

Management

Management objectives and prescriptions

  • Read the Glacial Lake Grantsburg Properties Master Plan.

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]

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Last revised: Thursday, October 19, 2017