What this visit allows
The Wisconsin DNR protects the Dalles State Natural Area inside the park and prohibits collecting rocks, minerals, fossils, soil, or other natural material there.
Check park admission, trail condition, interpretive-center hours, ice, flooding, and seasonal notices.
Tools, limits, and timing
Tools and methods
Camera, notebook, and binoculars only. Do not remove rock, enter potholes, climb closed faces, or move stones.
Amount and use
Observation and photography only; all natural material remains in place.
Season and current status
Trails are year-round but can be icy, wet, crowded, or closed; verify conditions.
Rules to confirm at the site
- Collect nothing.
- Stay on designated trails and overlooks.
- Do not move or stack rocks.
- Respect all State Natural Area restrictions.
An old webpage, saved map, app layer, social post, or prior visit cannot override a current closure, posted boundary, permit condition, mining claim, staff instruction, or landowner decision.
What makes the site geologically useful
Ancient basalt confines the St. Croix gorge, while powerful glacial meltwater drove sand and stones in vortices that bored cylindrical potholes.
The shape and location of each pothole record flow and abrasion, so the feature and its loose contents should remain undisturbed.
A low-impact trip plan
- 1
Open the current official source and check alerts before leaving home.
- 2
Confirm the property boundary, parking location, and activity rules on arrival.
- 3
Begin with observation or surface searching and make the smallest possible disturbance.
- 4
Photograph context before handling any material that the current rules allow you to keep.
- 5
Pack out every item you brought and leave protected or uncertain material in place.
Site-specific preparation
- Cliffs, stairs, ice, and the river require close attention.
- Stay behind barriers and keep children near adults.
- Wear traction appropriate to current conditions.
Official sources
Open every relevant source shortly before departure. Fees, booking windows, fire rules, seasons, roads, and collection conditions can change without notice.
- Dalles geology and no-collection rules Wisconsin Department of Natural Resources
- Pothole Trail Wisconsin Department of Natural Resources
Access and rule review: September 18, 2026. This guide is educational planning information, not a permit, reservation, boundary survey, or legal opinion.