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Wisconsin State Natural Areas Program Jackson Marsh (No. 278)

Jackson Marsh

Photo by Josh Mayer



Within Jackson Marsh Wildlife Area, Washington County. T10N-R20E, Sections 8, 9, 10, 11, 14, 15, 16. 590 acres.



Jackson Marsh features a southern wet forest of silver maple and a white cedar-tamarack swamp, a community type more common in northern Wisconsin. The silver maple forest is a mature, seasonally inundated wet forest with typically northern elements such as yellow birch and black ash. White cedar and tamarack are present in smaller numbers. The shrub layer is sparse with common winterberry and the ground layer is depauperate. The cedar swamp is a white-cedar-tamarack tract with trees 6-12 inches in diameter. Both cedar and tamarack have good reproduction - an indication of low deer browse. The ground layer contains sphagnum moss and boasts an excellent northern flora including twinflower, gay-wings, false mayflower, three-leaved goldthread, tall northern bog orchid, and numerous sedges. A large area of wet-mesic forest with yellow birch and black ash borders the conifer swamp and may serve as a good buffer for the swamp and help protect it from windthrow. Bird life is diverse with sharp-shinned hawk, broad-winged hawk, northern waterthrush, white-throated sparrow, scarlet tanager, winter wren, veery, and blue-winged, mourning, Canada and black-throated green warblers. Jackson Marsh is owned by the DNR and was designated a State Natural Area in 1994.


Driving directions

From the intersection of U.S. Highway 45 and State Highway 60 in Jackson, go east on 60 3.1 miles, then north on County Highway G 1.2 miles, then west on an access lane 0.1 mile and park.


Jackson Marsh is owned by:

  • WDNR


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.


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
  • 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: Monday, June 10, 2019