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Wisconsin State Natural Areas Program Dells Of The Eau Claire River (No. 109)

Dells Of The Eau Claire River

Photo by Thomas A. Meyer



Within Dells of the Eau Claire County Park, Marathon County. T29N-R10E, Section 7 SW¼. 40 acres.



The Dells of the Eau Claire River protects a scenic, narrow rocky gorge and waterfalls where geologic processes have resulted in an unusual tilting of bedrock. On this picturesque stretch of the Eau Claire River, the river cascades over outcrops of Precambrian-age rhyolite schist. The rhyolite schist, a very hard rock, was formed through metamorphosis and later tilted here to a nearly vertical position allowing the rock to split readily along the cleavage planes. In the dells, the river tumbles and spills across the rock's cleavage planes while it runs smoothly in other areas where the river flows parallel to the planes. The water current through the dells has been strong enough to produce a series of potholes, formed by the grinding action of swirling sand and gravel. Downstream the flow is quite tranquil. This is an excellent area to observe fracture controlled stream flow and the development of multiple stream terraces. The rocky gorge and forested areas are wooded with a northern mesic forest of hemlock, sugar maple, yellow birch, and mountain maple. Canada yew is abundant in dense patches and the spring flora is rich. The Dells of the Eau Claire is owned by Marathon County and was designated a State Natural Area in 1973.


Driving directions

From the intersection of Highways 52 and Y in Hogarty, go west and south on County Highway Y about 3.3 miles to a parking area south of the river and west of the road. Hiking trails lead through the natural area.

Hunting and trapping are prohibited in this county park.


Dells Of The Eau Claire River is owned by:

  • Marathon County


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.

Non-DNR lands

Hunting and trapping

This is a non-DNR owned SNA: Opportunities for hunting and trapping depend on the land owner. Please contact them directly to find out about their rules for hunting and trapping. You can find a link to other owner websites under the "Resource links" heading above. More details regarding allowable uses of this non-DNR owned SNA may be posted, if available, under the "Access" tab above.

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Prohibited activities

  • Horseback riding
  • Rock climbing
  • Vehicles, including bicycles, ATVs, aircraft, and snowmobiles except on trails and roadways designated for their use
  • Collecting of animals, 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
  • Camping and campfires
  • Geocaching

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

Last revised: Thursday, March 26, 2015