N Umpqua River: Agate & Chalcedony Rockhounding in Douglas County, Oregon

Updated June 2026

N Umpqua River is a mapped rockhounding spot in Douglas County, Oregon. Reported finds include agate, chalcedony, carnelian, jasper, petrified wood, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Douglas County
State: Oregon
Nearest road: Smith Springs Lane
Postcode: 97447
Coordinates: 43.29774, -122.93905

Geology at N Umpqua River

This spot sits on Little Butte Volcanics, mapped as lapilli tuff, green, light gray, yellow; andesine to labradorite feldspar phenocrysts; alteration: pyroxene to green clay and iron oxides; matrix: shards and fine ash; carbonized, and silicified wood and leaf fragments; alteration: feldspar partially replaced by zeolites; lithology: dacitic that formed roughly 34 to 5 million years ago. Petrified wood typically comes from volcanic ash beds like the ones associated with this ground, where buried forests were slowly replaced by silica.

Mapped unit: Little Butte Volcanics
Age: 34–5 Ma (Oligocene to Miocene)
Rock types: lapilli tuff, green, light gray, yellow; andesine to labradorite feldspar phenocrysts; alteration: pyroxene to green clay and iron oxides; matrix: shards and fine ash; carbonized, and silicified wood and leaf fragments; alteration: feldspar partially replaced by zeolites; lithology: dacitic
Elevation: 860 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 N Umpqua River

Conditions here are workable year-round, with typical highs from 47°F in winter to 85°F in summer.

Climate normals: NOAA 1991-2020 monthlies, IDLEYLD PARK 4 NE station (5 mi away), adjusted for elevation.

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 N Umpqua River

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 N Umpqua River.

N Umpqua River FAQ

Where is N Umpqua River?+

N Umpqua River is in Douglas County, Oregon, at 43.29774, -122.93905. Nearest road: Smith Springs Lane.

What rocks and minerals can you find at N Umpqua River?+

N Umpqua River is reported to produce Agate, Chalcedony, Carnelian, Jasper, Petrified Wood, Silicified Wood.

Is collecting allowed at N Umpqua River?+

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. Always confirm current rules with the managing agency before a trip.

What tools should I bring to N Umpqua River?+

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 N Umpqua River?+

N Umpqua River is workable year-round.

How do I get to N Umpqua River?+

Open the directions link to navigate to 43.29774, -122.93905 in Google Maps. The nearest road is Smith Springs Lane.

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Open N Umpqua River on the map

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