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.
Map of 21 agate collecting spots in Washington
Standout agate spots in Washington
Hand-picked from the full list below, with the reason each one earns a trip.
Crescent Beach
Clallam County County
Agates were once plentiful enough at Agate Bay, just west of Crescent Bay on the Strait of Juan de Fuca, to give the beach its name, and agate still weathers from the local basalt alongside variously colored chert and jasper. The setting on the northern Olympic Peninsula makes it one of the few documented agate beaches on the strait.
Ringold
Franklin County County
Iron-stained gravels at the base of the White Bluffs, on the east side of the Columbia River from Byers Landing to Ringold, hold frequent agate and jasper, the agate chiefly gray and buff chalcedony with some red hues. The Ringold Springs access here is Washington Department of Fish and Wildlife land on the Franklin County bank, outside Hanford Reach National Monument.
Moclips
Grays Harbor County County
The beach at Moclips lies within Washington's Seashore Conservation Area, documented in rockhounding guides for the agate and jasper that wash in along the tideline and stream gravels. State ocean beach rules allow small-scale collecting year round, so loose agate and jasper can be picked up for personal use. Material concentrates near the low-tide line after winter storms expose fresh gravel.
Pe Ell
Lewis County County
The Washington Geological Survey's gemstone report records that hundreds of pounds of agate have been taken between Adna and Pe Ell, in the heart of Lewis County's carnelian-agate country. Carnelian, the local red-orange chalcedony, occurs with agate, jasper, and dark petrified wood in the stream gravels. Most of the surrounding Willapa Hills is gated private timberland.
Best counties for agate in Washington
Ranked by the number of mapped agate spots. County links open the full rockhounding page for that county.
- Clallam County5 spots
- Lewis County4 spots
- Pacific County3 spots
- Jefferson County2 spots
- Kittitas County2 spots
- Cowlitz County1 spot
- Franklin County1 spot
- Grays Harbor County1 spot
- Klickitat County1 spot
- Skamania County1 spot
Every agate spot we track in Washington
Sorted by county. Coordinates open in Google Maps.
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?+
How many agate spots are mapped in Washington?+
Is it legal to collect agate in Washington?+
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.
