Point Iroquois Lighthouse: Lake Superior Agate & Yooperlite Rockhounding in Chippewa County, Michigan

Updated August 2026

Point Iroquois Lighthouse is a mapped rockhounding spot in Chippewa County, Michigan. Reported finds include lake superior agate, yooperlite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Chippewa County
State: Michigan
Coordinates: 46.48429, -84.63236

Geology at Point Iroquois Lighthouse

This spot sits on Jacobsville Sandstone, mapped as sandstone that formed roughly 1600 to 1000 million years ago. Tough silica like agate, jasper, and chert typically weathers out of beds like these and collects as float in drainages and on deflation surfaces.

Mapped unit: Jacobsville Sandstone
Age: 1600–1000 Ma (Mesoproterozoic)
Rock types: sandstone
Elevation: 610 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Best time to visit Point Iroquois Lighthouse

Best months: April to October. Typical highs run 77°F in midsummer and 24°F in midwinter, with winter lows near 9°F.

Climate normals: NOAA 1991-2020 monthlies, SAULT STE MARIE SANDERSON FLD station (13 mi away).

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.

Sources & 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: April 1, 2026

Michigan DNR — Rockhounding rules
Michigan Geological Survey
Isle Royale National Park — Rules
Community submissions reviewed against published agency rules

Found at Point Iroquois Lighthouse

Each chip 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 Point Iroquois Lighthouse.

Point Iroquois Lighthouse FAQ

Where is Point Iroquois Lighthouse?+

Point Iroquois Lighthouse is in Chippewa County, Michigan, at 46.48429, -84.63236.

What rocks and minerals can you find at Point Iroquois Lighthouse?+

Point Iroquois Lighthouse is reported to produce Lake Superior Agate, Yooperlite.

Is collecting allowed at Point Iroquois Lighthouse?+

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. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Point Iroquois Lighthouse?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

When is the best time to visit Point Iroquois Lighthouse?+

The most comfortable months at Point Iroquois Lighthouse are April to October.

How do I get to Point Iroquois Lighthouse?+

Open the directions link to navigate to 46.48429, -84.63236 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Michigan

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Open Point Iroquois Lighthouse on the map

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