Where to Find Fossils in Wisconsin: 16 Mapped Sites
Wisconsin has 16 documented sites where fossils have been reported, and the best-known are Oshkosh, Bluffs of Miss. River, and Racine. Every site is mapped below with GPS coordinates and links to a full report of access and what's been found there. 4 of the 16 sites are on public-access land.
Last updated: — data compiled by the Rockhounding.org Research Team · methodology
Fossils Map: Wisconsin
All 16 fossils sites in Wisconsin. Click a pin for the full site report.
Where Fossils Are Found in Wisconsin
Fossils live in sedimentary rock — limestone, shale, and sandstone. Fresh exposures are everything: roadcuts, creek banks after storms, quarry spoil, and eroding badlands beat weathered outcrop every time.
The richest reported sites in Wisconsin: Oshkosh, Bluffs of Miss. River, Racine, General Area Quarries, 86W. Berlin.
Of the 16 sites, 4 are public access. Check each site report for current land status before you go.
All Fossils Sites in Wisconsin
- Oshkosh — Public Access
- Bluffs of Miss. River — Public Access
- Racine — Public Access
- General Area Quarries — Public Access
- 86W. Berlin — Other
- Belleville — Other
- Bumastus (Cybantyx) cuniculus Subassociation, Schoonmaker Quarry, Wauwatosa — Other
- Eucalyptocrinites-Crotalocrinites-Caryocrinites Association of the Racine Format — Other
- Hope, southeast — Other
- Milwaukee Metropolitan Sewerage District Dropshafts KK-1 and LM-S, Racine Fm., W — Other
- MM — Other
- Racine — Other
- Racine Fm — Other
- RCa — Other
- roadcut north of Sister Bay, near intersection of Highway 42 and County Road Z — Other
- Top of quarry, north side of Wisconsin State Rte 81, 6.4 km west of Rte 213 — Other
How to Identify Fossils
Look for biological structure the rock around it lacks: shell curves and growth lines, the spongy honeycomb interior of bone, leaf veins, ribbed corals, or the segmented symmetry of a trilobite. Fossils usually contrast with their matrix in color or density. Bone that has mineralized feels heavier than fresh bone and often shows a polished brown-black surface.
Not sure what you found? Try our identification guide →Frequently Asked Questions
Where can I find fossils in Wisconsin?
Wisconsin has 16 mapped sites where fossils have been reported. The best-known are Oshkosh, Bluffs of Miss. River, and Racine. Each listing on the map above includes GPS coordinates, access type, and what has been found there.
How many fossils sites are mapped in Wisconsin?
We have 16 documented fossils sites in Wisconsin, compiled from community submissions and published locality records and reviewed by the Rockhounding.org Research Team.
Is it legal to collect fossils in Wisconsin?
Casual collecting is generally allowed on BLM and National Forest land for personal, non-commercial use — the standard BLM limit is 25 lbs per day plus one specimen. National parks, monuments, and many state parks prohibit collecting, and private land always requires the owner's permission. Check the site report for each location and verify current land status before you dig.
How do I identify fossil?
Look for biological structure the rock around it lacks: shell curves and growth lines, the spongy honeycomb interior of bone, leaf veins, ribbed corals, or the segmented symmetry of a trilobite. Fossils usually contrast with their matrix in color or density. Bone that has mineralized feels heavier than fresh bone and often shows a polished brown-black surface.
What should I bring to collect fossils?
The basics: a rock hammer, safety glasses, gloves, a bucket or padded bag for specimens, and a GPS app with the coordinates from this page. Add a spray bottle — wetting a stone makes color and banding far easier to judge in the field.
⚠️ Always verify current regulations, weather conditions, and access requirements before visiting any location. Information provided is based on community submissions and may not be current or accurate.
More to Find in Wisconsin
Data: Paleobiology Database, community submissions — reviewed and approved by the Rockhounding.org Research Team. Always verify current land status, regulations, and access before visiting any site.