Cannonball River — Rockhounding in Sioux County, North Dakota

Cannonball River is a mapped rockhounding spot in Sioux County, North Dakota. Reported finds include agate, chalcedony, silicified wood, jasper. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Sioux County
State: North Dakota
Coordinates: 46.35956, -100.94306

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 Cannonball River

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 Cannonball River.

Across the state line from Cannonball River

Cannonball River is close enough to the North Dakota border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Cannonball River FAQ

Where is Cannonball River?+

Cannonball River is in Sioux County, North Dakota, at 46.35956, -100.94306.

What rocks and minerals can you find at Cannonball River?+

Cannonball River is reported to produce Agate, Chalcedony, Silicified Wood, Jasper.

Is collecting allowed at Cannonball River?+

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.

How do I get to Cannonball River?+

Open the directions link to navigate to 46.35956, -100.94306 in Google Maps. Some spots are remote — check road conditions before driving out.

More rockhounding in North Dakota

See all 20 North Dakota spots →

Open Cannonball River on the map

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