Keweenaw Rocket Range: Granite & Prehnite Rockhounding in Keweenaw County, Michigan
- Minerals reported
- 4
- Best months
- May to October
Keweenaw Rocket Range is a mapped rockhounding spot in Keweenaw County, Michigan. Reported finds include granite, prehnite, copper, agate nodule. Below: coordinates, access notes, nearby spots, and trip-planning links.
Plan your visit
Generally open to casual rockhounding
- County
- Keweenaw County
- State
- Michigan
- Nearest road
- Rocket Range Road
- Postcode
- 49918
- Coordinates
- 47.43035, -87.71470
Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.
Land & collecting status
Generally open to casual rockhounding
Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.
Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.
Best time to visit Keweenaw Rocket Range
Comfortable months (45 to 90°F highs)
Best months: May to October. Typical highs run 73°F in midsummer and 23°F in midwinter, with winter lows near 11°F.
Climate normals: NOAA 1991-2020 monthlies, COPPER HARBOR FT WILKINS station (8 mi away).
Today's weather
Is today a good day to go?
The app shows live weather, recent rain, and a daily rockhounding score for Keweenaw Rocket Range.
Get the appSources & verification
Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.
State guidance last verified:
- Michigan DNR, Rockhounding rules
- Michigan Geological Survey
- Isle Royale National Park, Rules
- Community submissions reviewed against published agency rules
Found at Keweenaw Rocket Range
Each name opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.
Nearby rockhounding spots
Other rockhounding spots within driving distance of Keweenaw Rocket Range.
- High Rock BayKeweenaw County, Michigan · 0 mi awayPrehnite, Calcite, Copper
- Keweenaw PointKeweenaw County, Michigan · 2 mi awayKeweenaw Agate, Thomsonite, Datolite
- Manitou IslandKeweenaw County, Michigan · 4 mi awayLake Superior Agate, Quartz
- Esrey ParkKeweenaw County, Michigan · 16 mi awayGranite, Prehnite, Copper
- Central MineKeweenaw County, Michigan · 23 mi awayCopper, Chlorastrolite
- Cliff MineKeweenaw County, Michigan · 28 mi awayCopper, Calcite, Chlorite
- Cliff NorthKeweenaw County, Michigan · 28 mi awayCopper, Calcite, Chlorite
- Iroquois MineKeweenaw County, Michigan · 31 mi awayNative Copper
Keweenaw Rocket Range FAQ
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More rockhounding in Michigan
See all 119 Michigan spots →
Open Keweenaw Rocket Range on the map
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