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Rocks & Minerals

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The Modoc National Forest is one of the best places to study rocks and minerals in Northern California. The diversity found here is unmatched.  For collectors, there are areas set aside on the Warner Mountain Ranger District to collect obsidian with a permit. While no artifacts may be collected and all obsidian collection requires a permit, rockhounds may collect up to one five gallon bucket of mineral materials other than obsidian from the surface only. All excavation or other resource damage is prohibited during personal-use collection activities.

https://www.fs.usda.gov/activity/modoc/recreation/rocks-minerals