Rockhounding

Most of the Modoc National Forest is covered by basaltic lava flows. Mineral materials found on the forest include obsidian and obsidian needles, petrified wood and assorted gemstones. The east side of the Warner Mountains in particular has exposed rock in the many canyons, including finds of petrified wood and assorted gemstones and “pretty rocks.”
On the west side of the mountains near West Valley Reservoir are small deposits of opal. Where available on the surface, these can be collected as general surface rock and rockhounds may take one 10 gallon bucket per day fo...

[Expand Text]


Rockhounding Areas

  • Big Valley Ranger District area description
  • Devil's Garden Ranger District area description
  • Doublehead Ranger District area description
  • Warner Mountain Ranger District area description