Where to Find Opalized Wood in Washington
Washington has 10 mapped collecting spots that report opalized wood, spread across 6 counties. 8 of the spots are on land mapped as publicly accessible.
Spot list checked against source data on April 1, 2026.
Every opalized wood spot we track in Washington
Best spotColumbia RiverKittitas County, WashingtonPublic access · Opalized Wood, Petrified Wood
BickletonKlickitat County, WashingtonPermission required · Agate, Carnelian, Jasper +1- Cairn Hope PeakYakima County, WashingtonPermission required · Petrified Wood, Opalized Wood
MabtonYakima County, WashingtonPublic access · Petrified Wood, Opalized Wood- Petrified Forest State ParkKittitas County, WashingtonPublic access · Opalized Wood, Petrified Wood
- Rattlesnake Mt.Benton County, WashingtonPublic access · Petrified Wood, Opalized Wood
- Grand CouleeGrant County, WashingtonPublic access · Opalized Wood
- Horse Heaven HillsBenton County, WashingtonPublic access · Opalized Wood
- MattawaGrant County, WashingtonPublic access · Opalized Wood
- Moses CouleeDouglas County, WashingtonPublic access · Opalized Wood
Standout opalized wood spots in Washington
Hand-picked from the full list above, with the reason each one earns a trip.
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
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, Grant County, and Kittitas County. Every spot on this page is on the map, and each spot's own page has its 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. 8 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.
