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Where to Find Agate in Washington

Washington agate is dominated by Ellensburg blue, a soft cornflower-blue chalcedony found in dry gulches between Ellensburg and the Saddle Mountains in Kittitas County. The Saddle Mountain area also produces picture jasper and brown sagenite agate in basalt amygdules. Lake Goodwin and Damon Point on the Olympic Peninsula yield tide-tumbled agate and carnelian, and the Brewster terraces of the Columbia River basin add float agate eroded from older volcanic sources. Ellensburg blue is the prize, and surface collecting on private ranch ground is closed to the public; legal access concentrates on Department of Natural Resources land.

Spot list checked against source data on April 1, 2026.

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Every agate spot we track in Washington

Standout agate spots in Washington

Hand-picked from the full list above, with the reason each one earns a trip.

Best counties for agate in Washington

Ranked by the number of mapped agate spots. County links open the full rockhounding page for that county.

Before you go

Read the agate identification guide so you know what a keeper looks like in the field: Agate in the encyclopedia.

Agate in Washington FAQ

Where can you find agate in Washington?+
The mapped spots concentrate in Clallam County, Lewis County, and Pacific County. Known collecting areas include Ellensburg blue agate ground (Kittitas County), Saddle Mountains (Grant County), and Damon Point tide gravels (Grays Harbor County). Every spot on this page is on the map, and each spot's own page has its coordinates and access notes.
How many agate spots are mapped in Washington?+
26 spots across 12 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 agate 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. 19 of the 26 mapped spots here sit on land marked public. Always confirm current rules with the managing agency before you dig.

Where else to find agate

More minerals to hunt in Washington

Hunt agate 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.

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