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Wisconsin State Natural Areas Program Swenson Wet Prairie (now Avon Bottoms) (No. 64)

Swenson Wet Prairie (now Avon Bottoms)

Photo by Thomas A. Meyer



Within Avon Bottoms Wildlife Area, Rock County.



Swenson Wet Prairie was designated a State Natural Area in 1968. As per the 2016 Master Plan, it is now part of the larger Avon Bottoms State Natural Area No. 36.


Driving directions

From the intersection of State Highway 11 and County Highway T in Brodhead, go south on T 5 miles, then east on Smith Road 0.25-mile to a parking area south of the road. Walk south on the access lane 0.25-mile to the northwest corner of the site.


Swenson Wet Prairie (now Avon Bottoms) is owned by:

  • WDNR


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: Thursday, December 20, 2018