Where to Find Thundereggs in Oregon

Oregon has 12 mapped collecting spots that report thundereggs, spread across 4 counties. The largest share sits in Crook County County with 6 spots. 9 of the spots are on land mapped as publicly accessible, and 1 is a fee-dig site.

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

Standout thundereggs spots in Oregon

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

Whistler Spring
Crook County County
Whistler Spring is one of central Oregon's classic free National Forest thunderegg sites, listed by DOGAMI alongside White Fir in the Madras-Prineville rockhounding belt. The site is notable for accessible rhyolite-hosted nodules in Crook County's Ochoco country, a compact example of the geology behind Oregon's state rock.
White Fir Spring
Crook County County
White Fir Spring is a public Ochoco National Forest thunderegg locality, with DOGAMI and Mindat records tying the site to agate- and jasper-filled nodules. It stands out because the Crook County material is strongly associated with jasper cores, a useful contrast to Oregon thunderegg beds dominated by clearer chalcedony.

Best counties for thundereggs in Oregon

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

Every thundereggs spot we track in Oregon

Sorted by county. Coordinates open in Google Maps.

Spot	County	Minerals	Coordinates	Access
Desolation Canyon	Crook County	Thundereggs	44.4757, -120.5074	Public
Forked Horn Butte	Crook County	Thundereggs	44.4553, -120.5610	Public
Harvey CreekMill Creek Road	Crook County	Thundereggs	44.4578, -120.5968	Public
Whistler SpringNational Forest Development Road 2700-500	Crook County	Thundereggs	44.4964, -120.4859	Public
White Fir SpringWildcat Mountain Road	Crook County	Thundereggs	44.4046, -120.5536	Public
White RockWhite Rock Spring Road	Crook County	Thundereggs Agate Chalcedony Opal	44.4245, -120.5465	Public
AshwoodNortheast Trout Creek Road	Jefferson County	Agate Chalcedony Geode Jasper Thundereggs	44.7358, -120.7542	Permission
Priday Agate BedsNortheast Pony Butte Road	Jefferson County	Agate Chalcedony Jasper Opal Thundereggs	44.7373, -120.9073	Paid / fee
WillowdaleThe Dalles-California Highway	Jefferson County	Agate Chalcedony Geode Jasper Thundereggs	44.8038, -120.9424	Permission
Crane Mountain	Lake County	Agate Jasper Thundereggs	42.0688, -120.2901	Public
West Side Warner Peak	Lake County	Agate Chalcedony Geode Jasper Opal Thundereggs	42.4672, -119.7819	Public
Sunflower FlatS-509 Road	Wasco County	Jasper Thundereggs	45.0746, -121.4030	Public

Before you go

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

Thundereggs in Oregon FAQ

Where can you find thundereggs in Oregon?+

The mapped spots concentrate in Crook County County, Jefferson County County, and Lake County County. Every spot on this page appears on the map above with coordinates and access notes.

How many thundereggs spots are mapped in Oregon?+

12 spots across 4 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 thundereggs in Oregon?+

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. 9 of the 12 mapped spots here sit on land marked public, and 1 is a fee-dig operation where you pay for access and keep what you find. Always confirm current rules with the managing agency before you dig.

More minerals to hunt in Oregon

Hunt thundereggs in Oregon 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.