Bob Straub State Park: Agate & Jasper Rockhounding in Tillamook County, Oregon

Updated June 2026

Bob Straub State Park is a mapped rockhounding spot in Tillamook County, Oregon. Reported finds include agate, jasper, bloodstone, moonstone. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Permission required
County: Tillamook County
State: Oregon
Nearest road: Dune Ridge Trail
Postcode: 97135
Coordinates: 45.18212, -123.97048

Geology at Bob Straub State Park

This spot sits on surficial deposits; Beach deposits, mapped as beach sand that formed within roughly the last 3 million years. Gravels like these concentrate whatever survives the river: agate, jasper, and other tough silica typically show up as rounded, waxy stones.

Mapped unit: surficial deposits; Beach deposits
Age: 3 Ma to present (Quaternary)
Rock types: beach sand
Elevation: 0 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 Bob Straub State Park

Conditions here are workable year-round, with typical highs from 52°F in winter to 69°F in summer.

Climate normals: NOAA 1991-2020 monthlies, CLOVERDALE station (4 mi away).

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 Bob Straub State Park

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 Bob Straub State Park.

Across the state line from Bob Straub State Park

Bob Straub State Park 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.

Bob Straub State Park FAQ

Where is Bob Straub State Park?+

Bob Straub State Park is in Tillamook County, Oregon, at 45.18212, -123.97048. Nearest road: Dune Ridge Trail.

What rocks and minerals can you find at Bob Straub State Park?+

Bob Straub State Park is reported to produce Agate, Jasper, Bloodstone, Moonstone.

Is collecting allowed at Bob Straub State Park?+

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 Bob Straub State Park?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

When is the best time to visit Bob Straub State Park?+

Bob Straub State Park is workable year-round.

How do I get to Bob Straub State Park?+

Open the directions link to navigate to 45.18212, -123.97048 in Google Maps. The nearest road is Dune Ridge Trail.

More rockhounding in Oregon

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Open Bob Straub State Park on the map

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