Muriel O. Ponsler Memorial State Park: Agate & Jasper Rockhounding in Lane County, Oregon

Quick details

Access

Public area

County

Lane County

State

Oregon

Nearest road

Oregon Coast Highway

Coordinates

44.17008, -124.11633

Geology at Muriel O. Ponsler Memorial State Park

This spot sits on surficial deposits; Eolian deposits, mapped as dune sand and staining: iron bands 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; Eolian deposits

Age

3 Ma to present (Quaternary)

Rock types

dune sand and staining: iron bands

Elevation

30 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 Muriel O. Ponsler Memorial State Park

Conditions here are workable year-round, with typical highs from 53°F in winter to 64°F in summer.

Climate normals: NOAA 1991-2020 monthlies, YACHATS station (11 mi away).

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

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 Muriel O. Ponsler Memorial State Park

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

• AgateEncyclopedia →
• JasperEncyclopedia →