Agness Bar: Quartz & Chalcedony Rockhounding in Curry County, Oregon

Plan your visit

Confirm rules before collecting

County

Curry County

State

Oregon

Nearest road

Forest Road 33

Postcode

97406

Coordinates

42.55013, -124.06398

Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.

Land & collecting status

Confirm rules before collecting

Land status here is not confirmed. Verify with the managing agency before collecting, federal, state, and tribal rules differ.

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.

Best time to visit Agness Bar

Comfortable months (45 to 90°F highs)

Best months: September to June. Typical highs run 91°F in midsummer and 52°F in midwinter, with winter lows near 38°F.

Climate normals: NOAA 1991-2020 monthlies, ILLAHE station (5 mi away), adjusted for elevation.

Geology at Agness Bar

This spot sits on surficial deposits; Alluvial deposits, mapped as dune sand, marine terrace, mixed fluvial sediment, mixed glacial sediment, beach sand, and gray; mineralogy: quartz rich 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; Alluvial deposits

Age

3 Ma to present (Quaternary)

Rock types

dune sand, marine terrace, mixed fluvial sediment, mixed glacial sediment, beach sand, and gray; mineralogy: quartz rich

Elevation

170 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.

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