Gull Point: Keweenaw Agate Rockhounding in Ontonagon County, Michigan

Updated June 2026

Gull Point is a mapped rockhounding spot in Ontonagon County, Michigan. Reported finds include keweenaw agate. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Ontonagon County
State: Michigan
Nearest road: M 64
Coordinates: 46.83613, -89.54950

Geology at Gull Point

This spot sits on Oronto Group; Freda Sandstone, mapped as shale, siltstone, and arkose 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: Oronto Group; Freda Sandstone
Age: 1600–1000 Ma (Mesoproterozoic)
Rock types: shale, siltstone, and arkose
Elevation: 590 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 Gull Point

Best months: April to October. Typical highs run 80°F in midsummer and 26°F in midwinter, with winter lows near 10°F.

Climate normals: NOAA 1991-2020 monthlies, ONTONAGON 6 SE station (16 mi away), adjusted for elevation.

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 Gull Point

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Keweenaw Agate Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Gull Point.

Across the state line from Gull Point

Gull Point is close enough to the Michigan border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Gull Point FAQ

Where is Gull Point?+

Gull Point is in Ontonagon County, Michigan, at 46.83613, -89.54950. Nearest road: M 64.

What rocks and minerals can you find at Gull Point?+

Gull Point is reported to produce Keweenaw Agate.

Is collecting allowed at Gull Point?+

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 Gull Point?+

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 Gull Point?+

The most comfortable months at Gull Point are April to October.

How do I get to Gull Point?+

Open the directions link to navigate to 46.83613, -89.54950 in Google Maps. The nearest road is M 64.

More rockhounding in Michigan

See all 107 Michigan spots →

Open Gull Point on the map

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