South Fork Umpqua River - Myrtle Creek: Agate & Jasper Rockhounding in Douglas County, Oregon

Updated August 2026

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

Quick details

Access: Check locally
County: Douglas County
State: Oregon
Nearest road: North Main Street
Postcode: 97457
Coordinates: 43.02513, -123.29630

Geology at South Fork Umpqua River - Myrtle Creek

This spot sits on Myrtle Group; Riddle Formation, mapped as conglomerate, volcanic and dark chert-rich clasts clasts; veins: quartz; mafic and felsic volcanic rock, dark to gray chert, diabase and volcanic sandstone clasts, shale, fossils: very fossiliferous fossils, and siltstone that formed roughly 200 to 66 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: Myrtle Group; Riddle Formation
Age: 200–66 Ma (Jurassic to Cretaceous)
Rock types: conglomerate, volcanic and dark chert-rich clasts clasts; veins: quartz; mafic and felsic volcanic rock, dark to gray chert, diabase and volcanic sandstone clasts, shale, fossils: very fossiliferous fossils, and siltstone
Elevation: 580 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 South Fork Umpqua River - Myrtle Creek

Conditions here are workable year-round, with typical highs from 53°F in winter to 89°F in summer.

Climate normals: NOAA 1991-2020 monthlies, RIDDLE station (6 mi away).

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.

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 South Fork Umpqua River - Myrtle Creek

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 South Fork Umpqua River - Myrtle Creek.

Across the state line from South Fork Umpqua River - Myrtle Creek

South Fork Umpqua River - Myrtle Creek 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.

South Fork Umpqua River - Myrtle Creek FAQ

Where is South Fork Umpqua River - Myrtle Creek?+

South Fork Umpqua River - Myrtle Creek is in Douglas County, Oregon, at 43.02513, -123.29630. Nearest road: North Main Street.

What rocks and minerals can you find at South Fork Umpqua River - Myrtle Creek?+

South Fork Umpqua River - Myrtle Creek is reported to produce Agate, Jasper, Quartz, Carnelian, Petrified Wood.

Is collecting allowed at South Fork Umpqua River - Myrtle Creek?+

Confirm rules before collecting. Land status here is not confirmed. Verify with the managing agency before collecting — federal, state, and tribal rules differ. Always confirm current rules with the managing agency before a trip.

What tools should I bring to South Fork Umpqua River - Myrtle Creek?+

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 South Fork Umpqua River - Myrtle Creek?+

South Fork Umpqua River - Myrtle Creek is workable year-round.

How do I get to South Fork Umpqua River - Myrtle Creek?+

Open the directions link to navigate to 43.02513, -123.29630 in Google Maps. The nearest road is North Main Street.

More rockhounding in Oregon

See all 177 Oregon spots →

Open South Fork Umpqua River - Myrtle Creek on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.