Where to Find Opalized Wood in Washington
Washington has 10 mapped collecting spots that report opalized wood, spread across 6 counties. The largest share sits in Benton County County with 2 spots. 10 of the spots are on land mapped as publicly accessible.
Spot list checked against source data on April 1, 2026.
Map of 10 opalized wood collecting spots in Washington
Best counties for opalized wood in Washington
Ranked by the number of mapped opalized wood spots. County links open the full rockhounding page for that county.
- Benton County2 spots
- Grant County2 spots
- Kittitas County2 spots
- Yakima County2 spots
- Douglas County1 spot
- Klickitat County1 spot
Every opalized wood spot we track in Washington
Sorted by county. Coordinates open in Google Maps.
| Spot | County | Minerals | Coordinates | Access |
|---|---|---|---|---|
| Horse Heaven HillsSellards Road | Benton County | 46.1316, -119.8463 | Public | |
| Rattlesnake Mt. | Benton County | 46.3957, -119.6131 | Public | |
| Moses Coulee | Douglas County | 47.4521, -119.8104 | Public | |
| Grand CouleeAlcan Road Northeast | Grant County | 47.9297, -119.0072 | Public | |
| Mattawa | Grant County | 46.7747, -119.8489 | Public | |
| Columbia RiverBeverly Railroad Bridge | Kittitas County | 46.8349, -119.9497 | Public | |
| Petrified Forest State ParkRecreation Drive | Kittitas County | 46.9602, -119.9884 | Public | |
| BickletonTomith Road | Klickitat County | 46.0199, -120.5152 | Public | |
| Cairn Hope Peak | Yakima County | 46.5661, -119.9769 | Public | |
| Mabton | Yakima County | 46.1631, -119.9807 | Public |
Before you go
Read the opalized wood identification guide so you know what a keeper looks like in the field: Opalized Wood in the encyclopedia.
Opalized Wood in Washington FAQ
Where can you find opalized wood in Washington?+
The mapped spots concentrate in Benton County County, Grant County County, and Kittitas County County. Every spot on this page appears on the map above with coordinates and access notes.
How many opalized wood spots are mapped in Washington?+
10 spots across 6 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 opalized wood in Washington?+
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. 10 of the 10 mapped spots here sit on land marked public. Always confirm current rules with the managing agency before you dig.
Where else to find opalized wood
More minerals to hunt in Washington
Hunt opalized wood in Washington 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.
