Knife River beaches — Rockhounding in Lake County, Minnesota
Updated July 2026
The cobble beaches at Knife River are one of the North Shore's most reliable places to hunt Lake Superior agate, Minnesota's state gemstone, formed roughly a billion years ago in the gas vesicles of Keweenawan basalt along the Midcontinent Rift. Storms sort the shoreline gravel and expose fresh material, and both the lakeshore and the lower Knife River banks produce banded agate. The Knife River Marina beach offers rare, dedicated public parking and access directly on Lake Superior. Reported finds include lake superior agate. Below: coordinates, access notes, nearby spots, and trip-planning links.
Knife River beaches photos
Public image records connected to this spot or its reported material.
Map showing Knife River beaches in Lake County, Minnesota
Quick details
- Access
- Public area
- County
- Lake County
- State
- Minnesota
- Nearest road
- Sciff Landing Road
- Postcode
- 55609
- Coordinates
- 46.95035, -91.77834
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.
Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.
Found at Knife River beaches
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 Knife River beaches.
- French RiverSaint Louis County, Minnesota · 7 mi awayLake Superior Agate
- Kelsey BeachTop pick in MinnesotaLake County, Minnesota · 10 mi awayLake Superior Agate
- Gull RockLake County, Minnesota · 27 mi awayLake Superior Agate
- Beaver BayTop pick in MinnesotaLake County, Minnesota · 31 mi awayLake Superior Agate, Thomsonite
- Cloquet (area 2)Carlton County, Minnesota · 36 mi awayLake Superior Agate, Garnet, Greenalite
- CarltonCarlton County, Minnesota · 36 mi awayLake Superior Agate, Garnet, Greenalite
- CloquetTop pick in MinnesotaCarlton County, Minnesota · 37 mi awayLake Superior Agate, Garnet, Greenalite
- Little Marais RiverLake County, Minnesota · 45 mi awayThomsonite, Zeolite
Across the state line from Knife River beaches
Knife River beaches is close enough to the Minnesota border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.
- Wisconsin PointTop pick in WisconsinDouglas County, Wisconsin · 20 mi awayLake Superior Agate, Jasper, Copper
- AnniconDouglas County, Wisconsin · 31 mi awayCopper
- Bayfield CountyTop pick in WisconsinBayfield County, Wisconsin · 31 mi awayAgate, Jasper
- Ounce CreekDouglas County, Wisconsin · 52 mi awayAgate, Azurite, Bornite
- Big Bay Town ParkTop pick in WisconsinAshland County, Wisconsin · 55 mi awayLake Superior Agate, Jasper, Thomsonite
- General AreaAshland County, Wisconsin · 65 mi awayCopper
Knife River beaches FAQ
Why is Knife River beaches one of the best rockhounding spots in Minnesota?+
Where is Knife River beaches?+
What rocks and minerals can you find at Knife River beaches?+
Is collecting allowed at Knife River beaches?+
How do I get to Knife River beaches?+
More rockhounding in Minnesota
See all 49 Minnesota spots →Open Knife River beaches on the map
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