Where to Find Silicified Wood in North Dakota

North Dakota has 5 mapped collecting spots that report silicified wood, spread across 5 counties. The largest share sits in Billings County with 1 spot. 3 of the spots are on land mapped as publicly accessible.

Standout silicified wood spots in North Dakota

Hand-picked from the full list below, with the reason each one earns a trip.

Medora
Billings County
Medora sits in the badlands of Billings County, ringed by the Little Missouri National Grassland where the Forest Service permits casual collection of petrified wood, agate, and chalcedony.
Bismarck
Burleigh County
Bismarck fronts the Missouri River, the one North Dakota waterway the courts have held navigable, meaning the state owns the bed below the ordinary high water mark.
McKenzie County
McKenzie County
McKenzie County holds the largest share of the Little Missouri National Grassland, the one broadly reliable place in North Dakota to collect on public land.

Best counties for silicified wood in North Dakota

Ranked by the number of mapped silicified wood spots. County links open the full rockhounding page for that county.

Billings County1 spot
Burleigh County1 spot
Hettinger County1 spot
McKenzie County1 spot
Sioux County1 spot

Every silicified wood spot we track in North Dakota

Sorted by county. Coordinates open in Google Maps.

Spot	County	Minerals	Coordinates	Access
MedoraI 94	Billings County	Agate Chalcedony Silicified Wood	46.9233, -103.4921	Permission
BismarckGallatin Loop	Burleigh County	Agate Chalcedony Silicified Wood Jasper	46.7597, -100.8355	Public
Hettinger CountyState Highway 8	Hettinger County	Agate Chalcedony Silicified Wood Jasper Selenite	46.5117, -102.3170	Public
McKenzie County	McKenzie County	Montana Moss Agate Jasper Silicified Wood	47.9824, -103.8391	Public
Cannonball River	Sioux County	Agate Chalcedony Silicified Wood Jasper	46.3596, -100.9431	Permission

Before you go

Read the silicified wood identification guide so you know what a keeper looks like in the field: Silicified Wood in the encyclopedia.

Silicified Wood in North Dakota FAQ

Where can you find silicified wood in North Dakota?+

The mapped spots concentrate in Billings County, Burleigh County, and Hettinger County. Every spot on this page appears on the map above with coordinates and access notes.

How many silicified wood spots are mapped in North Dakota?+

5 spots across 5 counties. The RockHoundR app keeps the same spots on an offline map with public land overlays, geology layers, and your saved finds.

Is it legal to collect silicified wood in North Dakota?+

Hand collecting of common rocks and minerals in small amounts for personal use is generally allowed on BLM and U.S. Forest Service land, with limits set by the local field office. National parks, most state parks, and tribal land are closed to collecting. 3 of the 5 mapped spots here sit on land marked public. Always confirm current rules with the managing agency before you dig.

Where else to find silicified wood

Wyoming10 spots

More minerals to hunt in North Dakota

Hunt silicified wood in North Dakota with the map in your pocket

RockHoundR puts these spots on an offline map with BLM and Forest Service overlays, geology layers, and a log for your finds.