Mosier: Petrified Wood & Silicified Pine Cones Rockhounding in Wasco County, Oregon

Updated June 2026

Mosier is a mapped rockhounding spot in Wasco County, Oregon. Reported finds include petrified wood, silicified pine cones. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Permission required
County: Wasco County
State: Oregon
Nearest road: Carroll Road
Postcode: 97040
Coordinates: 45.67813, -121.38540

Geology at Mosier

This spot sits on surficial deposits; Alluvial deposits, mapped as mixed fluvial sediment and clasts; consolidation: unconsolidated that formed within roughly the last 12,000 years. Petrified wood typically travels as tough float, and worked gravels like these are exactly where weathered pieces tend to collect.

Mapped unit: surficial deposits; Alluvial deposits
Age: < 1 Ma (Holocene)
Rock types: mixed fluvial sediment and clasts; consolidation: unconsolidated
Elevation: 200 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 Mosier

Best months: February to November. Typical highs run 83°F in midsummer and 42°F in midwinter, with winter lows near 31°F.

Climate normals: NOAA 1991-2020 monthlies, HOOD RVR EXP STN station (6 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 Mosier

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 Mosier.

Across the state line from Mosier

Mosier 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.

Mosier FAQ

Where is Mosier?+

Mosier is in Wasco County, Oregon, at 45.67813, -121.38540. Nearest road: Carroll Road.

What rocks and minerals can you find at Mosier?+

Mosier is reported to produce Petrified Wood, Silicified Pine Cones.

Is collecting allowed at Mosier?+

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 Mosier?+

A rock hammer, sturdy gloves, and a padded bag cover petrified wood hunting. Most pieces are surface float, so walking slopes and washes beats digging.

When is the best time to visit Mosier?+

The most comfortable months at Mosier are February to November.

How do I get to Mosier?+

Open the directions link to navigate to 45.67813, -121.38540 in Google Maps. The nearest road is Carroll Road.

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