Isle Royale Greenstone
Rockhounding site in Copper Harbor, Michigan · Other
Isle Royale Greenstone is a chlorastrolite rockhounding site near Copper Harbor, MI. Fee varies. Best season: Summer ferry access.
Typical season: Summer ferry access
Key facts
Structured details for trip planning — verify access and fees with the land manager before you visit.
- Specimen type
- Chlorastrolite
- Primary specimens
- Chlorastrolite, Agate, Copper
- Fee status
- Fee varies
- Nearest town
- Copper Harbor
- State
- Michigan
- Coordinates
- 47.99000, -89.55000
- Best season
- Summer ferry access
- Access difficulty
- Moderate island wilderness
- Camping
- Isle Royale backcountry permits
- Activities
- Greenstone geology observation
- Facilities
- Park visitor centers
- Last updated
- July 5, 2026
What to pack for Isle Royale Greenstone
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The experience
- Best time to visitSummer ferry access
- AccessModerate island wilderness
- FacilitiesPark visitor centers
- Camping nearbyIsle Royale backcountry permits
Map & location
Sources & updates
Spotted outdated access, fees, or safety info? Send a correction with the page URL — we review every submission.
Safety notice: Field and weather conditions change with weather, season, and field conditions. Verify current conditions with local land managers before you go. Collect at your own risk — there are rarely rangers or land managers at these sites.