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Washington State Rockhounding Location Guide & Map

Washington is a fantastic state for rockhounding, both for its wide variety of minerals and its large number of prospective rockhounding sites. The state is divided by the Cascades, with beautiful ocean beaches noted for their agate hunting to the west, and large basaltic lava flows to the east which are largely responsible for much of the fossilized and petrified wood found in the region.

Due to the relatively recent and extensive volcanic activity in the area, Washington State is one of the best states in the entire U.S. for rockhounding. The basalt flows fossilized vast forests, creating enormous amounts of fossilized and opalized wood, and the void spaces left by gas pockets in the lava flows created countless agates and jaspers which are now highly sought after by rockhounds from all over the world.

The best places to rockhound in Washington are Pacific Ocean beaches, river and stream gravels, and countless mines found across the state. In particular, the beaches around Olympic National Park are famous for their beautiful agates, and the Horse Heaven Hills area produces many specimens of opalized wood.

State Symbols
State Mineral
State Rock
State GemstonePetrified Wood
State FossilColumbian Mammoth
Washington: Source

Petrified Wood
Petrified Wood

Rocks & Minerals Found in Washington State

Washington sports a wide variety of minerals, particularly minerals in the quartz family. Due to its relatively recent volcanic activity in the eastern part of the state, agates, jaspers, and fossilized wood are bountiful all across the area. Other desirable rocks and minerals such as geodes and opal are also are fairly common if you look in the right locations.

The most commonly found minerals in Washington State are:

  • Agate
  • Jasper
  • Chalcedony
  • Chert
  • Quartz crystals
  • Opalized wood
  • Fossilized wood
  • Geodes
  • Opal

If you’ve already found a rock and you’re not sure what it is, I would highly recommend checking out my Practical Rock Identification System. This bundle of information includes a book, videos, and online tools. It is, simply put, the most comprehensive and easy-to-understand rock identification system you’ll find anywhere.

You can also read through my free rock identification guide and mineral identification guide which are filled with useful information and tools.

Rockhounding Locations in Washington State

Important Disclaimer: I have not been to these locations myself, and I do not know if they are currently open for collecting. Use this resource as a guide to get you started. Follow posted signage and always get permission from the landowner to collect.

Through quite a bit of research and cross-referencing of available literature, I have compiled this list of some prospective locations in Washington which I would recommend to people looking to do some rockhounding. These are mostly comprised of old mining prospects, streams, and historically known rock and mineral collecting sites. For additional reading, I’d highly recommend these books you can find on Amazon:

Please remember that rock collecting locations are constantly changing. Specimens may become depleted from other collectors, the location may have been built on or altered, locality information in literature may be inaccurate, and property ownership may have changed hands. Though there are many locations listed here, this list is far from exhaustive. A location’s listing here is not a guarantee of accuracy. Be safe, never go underground, and make sure to get permission from the landowner to search for and collect specimens.

If you’re planning on heading to the field, make sure you have all the gear you’ll need! To get started, you can check out my recommended gear page which contains my full reviews for every Geologist’s favorite rock hammer and the best hiking backpack I’ve ever owned.

NOTE: All the locations listed in these tables are clickable, and will take you to the location on Google Maps.

For ease of reference, I’ll break up the state into the four regions shown on the map below. Each region will have its own list of rockhounding locations with an accompanying map.

Seattle & Northwest Washington Rockhounding Locations

The best places to go rockhounding in Northwestern Washington are the beaches of the Pacific Ocean and the gravels of the many regional rivers and creeks. The ocean beaches are famous for their agates, jaspers, and other quartz minerals, while the banks of the rivers and creeks are often panned for gold.

If you’re looking for rockhounding locations close to Seattle or Tacoma, unfortunately, your best bet will be to either check out the sites I list below in southwestern Washington or to travel to the Pacific Ocean beaches to do some beachcombing. You can also try the area around Denny Mountain where specimens of rock crystal (exceptionally clear quartz crystals) have been found. The Seattle and Tacoma metro areas aren’t well known for their rockhounding, although you may be able to find some interesting specimens along the shores of the Puget Sound.

LocationRocks & Minerals
Shi Shi BeachGold, Iridosmine, Platinum
Dungeness, in river gravelsAgate, Jasper (Orbicular)
Lake Crescent, 1 mi. NW of W end of lakeJasper
Crescent Beach, area gravelsAgate, Chert, Jasper
La Push, area beach gravelsAgate, Jasper
Sol Duc River, in gravelsAgate, Chert, Jasper
Ozette River, in gravelsGold (placer)
Sappho, in Sol Duc River gravelsAgate, Jasper (Orbicular)
Thunder Creek District, area mining dumpsSilver
Hamilton, S bank of Skagit RiverHematite, Gold (placer)
Darrington, area stream & river gravelsGold (placer)
Gold Bar, sands along Skykomish RiverGold
Granite Falls, area gravels and streamsGold
Monte Cristo, area mining dumpsArsenic, Arsenopyrite, Azurite, Chalcopyrite, Malachite, Melaconite, Pyrite, Pyrrhotite, Realgar, Scorodite
Sultan, area mines & sands along riverGold
Pasayten Wilderness, numerous minesGold, Pyrite
Denny Mt., W side above creekRock crystal
Money Creek, area lode minesGold
Issaquah, E side of Fifteen-Mile CreekAmber

Central Washington Rockhounding Locations

Central Washington is home to a plethora of fantastic rockhounding destinations. This part of the state boasts a wide variety of minerals to be found, equitably distributed throughout the region. The best places to rockhound in Central Washington are the sands and gravels of the many regional rivers and streams, as well as select mountainsides and hillsides. The Horse Heaven Hills area is particularly notable for its opalized wood and petrified wood. The rivers and streams of this part of the state are also very popular for gold panning.

LocationRocks & Minerals
Horse Heaven Hills, area washes & drawsOpalized wood
Horseshoe Basin district, area minesChalcopyrite, Galena
Columbia River, area sandsGold (placer)
Bridgeport, area exposuresJadeite
Waterville, area excavations, gravels, diggings, etc.Opal (Common)
Cle Elum, areaAgate (Blue)
Red Top Mt. and Teanaway Ridge, both sides of roadGeodes (Blue agate)
Middle Fork Teanaway River, in gravelsAgate, Geodes (Chalcedony)
Ellensburg, N of town weathering out of lava flowsGeodes (Blue chalcedony)
Liberty, along Williams & other area creeksGold (placer)
Liberty, area 2 mi. to NEAgate, Chalcedony nodules
Petrified Forest State Park, outside boundariesOpalized wood, Petrified wood
Columbia River, gravels & sands S of VantageOpalized wood, Petrified wood
Bickleton, area W of townAgate, Carnelian, Jasper, Opalized wood
Lyle, hillsides 2 mi. E of townPetrified wood
Klickitat River, 6 mi. upstream from LylePetrified wood
Cathedral Peak, area minesWolframite
Methow, area minesStibnite, Chalcopyrite
Osoyoos Lake, area mines S of borderCopper minerals, Pyrite
Tunk Creek, gravels of the mouthQuartz crystals, Corundum (blue, pink), Thulite, Plagioclase
Mary Ann Creek, placersGold (placer)
American River, placer deposits for many milesGold (placer)
Mabton, area draws, washes, hillsides, etc.Petrified wood, Opalized wood
Rattlesnake Mt., area on S sidePetrified wood, Opalized wood
Cairn Hope Peak, area on S sidePetrified wood, Opalized wood

Eastern Washington Rockhounding Locations

Eastern Washington boasts quite a few notably rockhounding destinations. The streams and rivers of this part of the state are well known for their gold placer deposits, and there are countless old mining dumps where a wide variety of minerals can be found. The Grand Coulee area is particularly notable for its opalized wood specimens, and there are several areas including Bald Butte where rockhounds can hope to collect their own quartz crystals.

LocationRocks & Minerals
Clarkston, area sand & gravel exposuresGold (placer)
Snake River, in sand barsGold (placer)
Lyman Lake, Crown Point Mine to WGold, Quartz crystals
Covada, the Longstreet Mine dumpStibnite
Nespelem to Coulee Dam, Columbia River sandsGold (placer)
Gold Creek, placer depositsGold (placer)
Ringold, area gravels near Columbia RiverAgate
Mattawa, Saddle Mountains areaOpalized wood (logs)
Grand Coulee, area lava outcrop debrisOpalized wood
Moses Coulie, area lava outcropsOpalized wood
Loon Lake Copper MineAzurite, Bornite, Chalcopyrite, Malachite, Pyrite, Quartz
Mondovi, NW in lava outcropsOpal, Fire Opal
Metaline Falls, Josephine MineSmithsonite
Newport, area gravels, streams, etc.Amethyst
Sacheen Lake, shorelinesGarnet
Daybreak MineAutunite
Chattaroy, gravels of Little Spokane RiverGarnet, Quartz crystals
Silver Hill, SE of SpokaneCassiterite
Copper King Mine, NE of ColvilleChalcopyrite
Deer Lake, area to the E in quartz veinsPyrite
Marcus, area placersGold (placer)
Snake River, area gravel & sand barsGold (placer)
Bald Butte, S side area washes & drawsQuartz crystals (smoky quartz)
Pullman, in lava outcrops to the NEOpal (fire opal)

Southwest Washington Rockhounding Locations

Southwestern Washington is perhaps the best region of the state in which to go rockhounding. Much like Oregon, this part of the state is especially famous for its agates and jaspers found along the Pacific Ocean beaches. In fact, many quartz family minerals can be found across Southwestern Washington including agate, jasper, amethyst, carnelian, chalcedony, and petrified wood. The Pacific Ocean beaches are the best places to rockhound, but for more diverse specimens including amethyst geodes you can check out the other locations on this list including and Mt. Adams.

LocationRocks & Minerals
Brush Prairie, in area sandsGold (placer)
Camas, in Columbia River sandbarsGold, (placer)
Washougal, area 2.5 mi. to NEAgate (moss agate), Amethyst
Kelso, to S at base of cliffs along I-5Agate
Aberdeen, on beaches and in streamsJasper (flower jasper)
Moclips, N on beaches and in stream gravelsAgate, Jasper
Kalaloch, area beach gravelsAgate, Jasper
Queets, area beach gravelsAgate, Chert, Jasper
Lucas Creek, area E of AdnaAgate, Carnelian, Chalcedony, Geodes, Jasper, Petrified wood
McCoy Farm near Adna (fee)Carnelian, Petrified wood
Centralia, regional stream and river gravelsAgate, Carnelian, Chalcedony, Geodes, Jasper, Petrified wood
Doty, in Chehalis River gravelsAgate, Carnelian, Chalcedony, Geodes, Jasper, Petrified wood
Newaukum River gravels, near ForestGeodes, Nodules
Pe Ell, regional river and stream gravelsAgate, Carnelian, Chalcedony, Geodes, Jasper, Petrified wood
Toledo, area river and stream gravelsGeodes, Nodules
Willapa Hills, area gravels & road cutsAgatized fossil shells
Lebam, gravels of Willapa RiverAgatized fossil shells, Chalcedony
Long Beach, in beach gravelsAgate, Chalcedony, Quartz
Ocean Park, in beach gravelsAgate, Chalcedony, Quartz
Green Creek, N of HolcombAgate, Carnelian, Chalcedony, Jasper
Clay City, area ~1 mi. EAmethyst
Mt. Adams, areaAgate, Carnelian, Chalcedony, Jasper, Quartz crystals

Where to Find Agates in Washington

Agates are some of the easiest to find and most enjoyable specimens sought by rock collectors. The Pacific Northwest is world-famous for its agates, particularly along the beaches of the Pacific Ocean. A determined collector can likely find agates on nearly any ocean beach in Washington, but there are certainly some that are better than others. Beyond the ocean beaches, there are many rivers and streams throughout Washington where fantastic agate specimens can be found.

These agates form when the void spaces left by air pockets in cooling basalt lava flows are subsequently filled with microcrystalline quartz. This gradual process often produces beautiful banding and interesting patterns. The colors vary depending on the various impurities which precipitate into the void space along with the silica. After the basalt flows are weathered away, the exceptionally hard agates are left behind and transported in fast-moving water.

The best places to find agates in Washington are:

Tip: Check out my Complete Rock Tumbling Guide to make your rocks and gemstones really shine!

Where to Find Geodes in Washington State

Geodes are some of the most popular and attractive rock specimens sought after by rockhounds, and for good reason. They are a blast to find and even better to crack open to see what treasures they hold inside. Fortunately for you rockhounds in Washington, there are several places in the state when you can go to find your own. These geodes can be filled with a variety of minerals including chalcedony, agate, and amethyst. For more information on the Walker Valley geode location, I would highly recommend this site.

The best places to find geodes in Washington State are:

Tip: You can purchase your own geodes from Amazon

Where to Find Fossils in Washington State

Washington is home to a wide variety of fossils, ranging from ancient plants to mammoth bones (the mammoth happens to be the state fossil). Some of the most commonly found fossils are clams shells which have been opalized or fossilized and turn up along the shores of beaches and rivers. Quality fossil digging sites are hard to find in the state, but luckily there are a few locations that a open to the public where rockhounds can go with the hope of discovering their own quality specimens.

The best places to find fossils in Washington State are the Stonerose Interpretive Center & Eocene Fossil Site and the Ginkgo Petrified Forest. To see fossils on display I would recommend checking out the Burke Museum. For a wealth of information about the types of fossils found in Washington State and their localities, you can check out Fossils in Washington from the Washington Department of Natural Resources.

Where to Find Jade in Washington

Luckily for rockhounds, Washington State is one of very few places where jade can be found in the U.S. Even so, jade is pretty rare and can only be found in a select few locations and will likely require some dedication and luck. If you get particularly lucky you might unearth something as spectacular as an 8-ton nephrite jade boulder.

The best places to search for jade are:

Washington State Rockhounding Laws & Regulations

One of the most common questions rockhounds have is whether or not they are allowed to collect at a certain location. It is the responsibility of each rockhound to obtain permission from a landowner to search and/or collect on a piece of property.

The ownership and status of land can and does change frequently, making it impossible to document accurate information on this page. However, I have compiled a list of resources here so that you may investigate and obtain permission for any locations (found here or elsewhere) for yourself.

Public Land Resources

I have written entire articles which cover the rockhounding laws and regulations for nearly every type of public land you can think of. I encourage you to check them out if you are curious about the legalities of rock and mineral collecting.

To determine what type of public land a particular location is on, I would recommend starting with the Washington Department of Natural Resources State Trust Lands Map and the Washington Non-DNR Major Public Lands Portal.

Private Land Resources

As with most states, each county in Washington will have records of who owns each piece of property. Unfortunately for rockhounds, the law in most states prohibits them from publishing their names or contact information online. You can usually get the landowner’s name and address by visiting the county records office. In Washington, I would recommend starting with the County Assessor‘s office.

Sources & Further Reading

The locations and information contained in this article are my interpretations of potentially interesting rockhounding sites, primarily derived from academic papers and other outside sources. I have listed several potentially useful resources below if you would like to explore further.