About this location
This entry marks a stretch of the upper Klamath River in Siskiyou County, California, near Hornbrook, close to the Oregon border and downstream of Iron Gate Dam. The Klamath River corridor has a long-standing reputation among California rockhounds for agate, jasper, and petrified wood in its gravel bars — general knowledge among collectors working the Highway 96 corridor further downstream — but we found no source specific to this exact stretch near Hornbrook confirming a particular gravel bar, access point, or land manager. Siskiyou County along the Klamath is a patchwork of Klamath National Forest, BLM, and private ranch land, so land status here has to be checked case by case rather than assumed.
Always seek permission where required, follow local laws, and practice Leave No Trace. Locations and details are community-submitted and may be inaccurate. Not sure what's legal here? Read our full guide to rockhounding laws by land type.
Found Here
- Agate, Bloodstone, Jasper, Petrified Wood — consistent with the general reputation of Klamath River gravel deposits in this part of Northern California, though not independently confirmed for this specific stretch near Hornbrook.
Difficulty
Getting there
The general area sits along the Klamath River in Siskiyou County, near Hornbrook, close to the California-Oregon state line and downstream of Iron Gate Dam. We found no specific named access road or gravel bar confirmed for this exact location.
Collecting here
General-area inference: Klamath River gravel-bar collecting typically means surface picking waterworn material with a small shovel or pick and a bucket, working exposed bars at low water. No source confirms specific conditions at this exact stretch.
Know before you go
Land status is UNVERIFIED. This stretch of the Klamath runs through a mix of Klamath National Forest, BLM, and private ranch land in Siskiyou County — confirm which you're on before collecting, and check current rules with the Klamath National Forest office or the BLM's Redding Field Office for the specific stretch you plan to visit.
Location on Map
Coordinates: 42.00089, -122.40175
Nearby rockhounding locations
- Jenny Creek — Agate, CarnelianCA · 1.7 mi
- Green Springs Mt. — Agate, CarnelianOR · 10.6 mi
- 3 miles north of Henley — FossilCA · 9.2 mi
- CAS Loc. 444 - Hornbrook — FossilCA · 10.1 mi
- Bonanza — Gold, QuartzCA · 16 mi
- Bonanza — GoldCA · 16.3 mi
Frequently asked questions
What can you find along the Klamath River near Hornbrook, California?
Agate, bloodstone, jasper, and petrified wood are associated with Klamath River gravel deposits generally in this part of Siskiyou County, though not independently confirmed for this specific stretch.
Is the Klamath River agate area near Hornbrook public land?
Unverified — this stretch of the river runs through a mix of Klamath National Forest, BLM, and private ranch land, so confirm ownership at your specific access point before collecting.
Where is this Klamath River agate area located?
Near Hornbrook in Siskiyou County, California, close to the Oregon border, downstream of Iron Gate Dam.
⚠️ Always verify current regulations, weather conditions, and access requirements before visiting any location. Information provided is based on community submissions and may not be current or accurate.
Sources
- Reverse geocode (api.bigdatacloud.net) — confirms coordinates (42.00089, -122.40175) fall in Siskiyou County, California, near Hornbrook, close to the Oregon border.
- General knowledge of the Klamath River's regional reputation among California rockhounds for agate, jasper, bloodstone, and petrified wood in gravel bars (no site-specific primary source found for the Hornbrook stretch specifically; per spec, rockhoundr.com and similar aggregator results for this exact query were excluded as verification).
Recommended Gear for California

Estwing E3-22P Rock Pick
The industry-standard 22oz geological hammer. One-piece forged steel with shock-reduction grip.

Clear Anti-Fog Safety Glasses (4 Pack)
Adjustable, anti-fog lenses for clear vision in any conditions. About $5 per pair.

Watertight Medical Kit
Compact, waterproof first aid kit with bandages, moleskin, and field essentials.

Southwest Treasure Hunter's Gem and Mineral Guide
Whether you're digging for the first time or are an experienced rockhound or "prospector," with a simple rock hammer and...
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