Willowdale: Geode Digging in Jefferson County, Oregon

Updated June 2026

Willowdale is a mapped rockhounding spot in Jefferson County, Oregon. Reported finds include agate, chalcedony, geode, jasper, thundereggs. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Permission required
County: Jefferson County
State: Oregon
Nearest road: The Dalles-California Highway
Coordinates: 44.80384, -120.94241

Geology at Willowdale

This spot sits on surficial deposits; Alluvial deposits, mapped as mixed fluvial gravel, mixed fluvial silt, and mixed fluvial sand that formed within roughly the last 3 million years. Geodes weather out of their host rock and collect in gravels like these, where their round shape and light heft help them stand out.

Mapped unit: surficial deposits; Alluvial deposits
Age: 3 Ma to present (Quaternary)
Rock types: mixed fluvial gravel, mixed fluvial silt, and mixed fluvial sand
Elevation: 1,740 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Best time to visit Willowdale

Best months: September to June. Typical highs run 92°F in midsummer and 48°F in midwinter, with winter lows near 30°F.

Climate normals: NOAA 1991-2020 monthlies, ANTELOPE 6 SSW station (9 mi away), adjusted for elevation.

Land & collecting status

Permission required before collecting

Requires landowner or agency permission before any collecting. Do not enter without explicit authorization.

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: April 1, 2026

BLM Oregon/Washington — Rockhounding & mineral material
Oregon Department of Geology and Mineral Industries (DOGAMI)
Oregon Parks and Recreation Department — beach collecting rules
Community submissions reviewed against published agency rules

Found at Willowdale

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 Willowdale.

Across the state line from Willowdale

Willowdale is close enough to the Oregon border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Willowdale FAQ

Where is Willowdale?+

Willowdale is in Jefferson County, Oregon, at 44.80384, -120.94241. Nearest road: The Dalles-California Highway.

What rocks and minerals can you find at Willowdale?+

Willowdale is reported to produce Agate, Chalcedony, Geode, Jasper, Thundereggs.

Is collecting allowed at Willowdale?+

Permission required before collecting. Requires landowner or agency permission before any collecting. Do not enter without explicit authorization. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Willowdale?+

Bring a crack hammer, a chisel, safety glasses, and a bucket. Candidates are rounder and lighter than solid rock; a soil pipe cutter opens them cleaner than a flat smash.

When is the best time to visit Willowdale?+

The most comfortable months at Willowdale are September to June.

How do I get to Willowdale?+

Open the directions link to navigate to 44.80384, -120.94241 in Google Maps. The nearest road is The Dalles-California Highway.

More rockhounding in Oregon

See all 177 Oregon spots →

Open Willowdale on the map

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