Where to Find Rhyolite in Michigan
Michigan has 7 mapped collecting spots that report rhyolite, spread across 5 counties. The largest share sits in Luce County with 3 spots. 4 of the spots are on land mapped as publicly accessible, and 2 are fee-dig sites.
Spot list checked against source data on April 1, 2026.
Every rhyolite spot we track in Michigan
Best spotWoodland Park Beach, Grand MaraisAlger County, MichiganPublic access · Yooperlite, Lake Superior Agate, Jasper +6
Two Hearted River State Forest CampgroundLuce County, MichiganFee dig · Unakite, Epidote, Chert +16
Crisp Point LighthouseLuce County, MichiganPublic access · Granite, Quartz, Chert +9- McClain State ParkHoughton County, MichiganPermission required · Adularia, Chalcedony, Chert +8
- Muskallonge Lake State ParkLuce County, MichiganFee dig · Granite, Chert, Omar +7
- Gratiot River County ParkKeweenaw County, MichiganPublic access · Freda Sandstone, Basalt, Rhyolite +5
- Green ParkOntonagon County, MichiganPublic access · Charlevoix Stone, Honeycomb Coral, Rhyolite +3
Standout rhyolite spots in Michigan
Hand-picked from the full list above, with the reason each one earns a trip.
Best counties for rhyolite in Michigan
Ranked by the number of mapped rhyolite spots. County links open the full rockhounding page for that county.
Before you go
Read the rhyolite identification guide so you know what a keeper looks like in the field: Rhyolite in the encyclopedia.
Rhyolite in Michigan FAQ
Where can you find rhyolite in Michigan?+
The mapped spots concentrate in Luce County, Alger County, and Houghton County. Every spot on this page is on the map, and each spot's own page has its coordinates and access notes.
How many rhyolite spots are mapped in Michigan?+
7 spots across 5 counties. The RockHoundR app keeps the same spots on an offline map with public land overlays, geology layers, and your saved finds.
Is it legal to collect rhyolite in Michigan?+
Hand collecting of common rocks and minerals in small amounts for personal use is generally allowed on BLM and U.S. Forest Service land, with limits set by the local field office. National parks, most state parks, and tribal land are closed to collecting. 4 of the 7 mapped spots here sit on land marked public, and 2 are fee-dig operations where you pay for access and keep what you find. Always confirm current rules with the managing agency before you dig.
More minerals to hunt in Michigan
Hunt rhyolite in Michigan with the map in your pocket
RockHoundR puts these spots on an offline map with BLM and Forest Service overlays, geology layers, and a log for your finds.
