Mattawa — Rockhounding in Grant County, Washington
Mattawa is a mapped rockhounding spot in Grant County, Washington. Reported finds include opalized wood. Below: coordinates, access notes, nearby spots, and trip-planning links.
Map showing Mattawa in Grant County, Washington
Quick details
- Access
- Public area
- County
- Grant County
- State
- Washington
- Coordinates
- 46.77474, -119.84886
Land & collecting status
Generally open to casual rockhounding
Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.
Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.
Sources & verification
Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.
State guidance last verified:
- Washington Geological Survey (DNR)
- Stonerose Interpretive Center — Visit & rules
- BLM Spokane District
- Community submissions reviewed against published agency rules
Found at Mattawa
Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.
Nearby rockhounding spots
Other rockhounding spots within driving distance of Mattawa.
- Columbia RiverKittitas County, Washington · 6 mi awayOpalized Wood, Petrified Wood
- Petrified Forest State ParkKittitas County, Washington · 14 mi awayOpalized Wood, Petrified Wood
- Cairn Hope PeakYakima County, Washington · 16 mi awayPetrified Wood, Opalized Wood
- Rattlesnake Mt.Benton County, Washington · 28 mi awayPetrified Wood, Opalized Wood
- RingoldFranklin County, Washington · 35 mi awayAgate
- EllensburgKittitas County, Washington · 38 mi awayGeode
- MabtonYakima County, Washington · 43 mi awayPetrified Wood, Opalized Wood
- Horse Heaven HillsBenton County, Washington · 44 mi awayOpalized Wood
Mattawa FAQ
Where is Mattawa?+
What rocks and minerals can you find at Mattawa?+
Is collecting allowed at Mattawa?+
How do I get to Mattawa?+
More rockhounding in Washington
See all 92 Washington spots →Open Mattawa on the map
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