The Sixes River flows into the Pacific at Cape Blanco. It is unique because it carries gold right down to the ocean. Historic miners worked the beaches here, and the black sand concentrations are insane.

The mouth of the river is within **Cape Blanco State Park**. Rules here are strict: "Hands and Pans" only on the beach.
No Sluices on Beach: You generally cannot use sluice boxes in the surf or on the park beach. Move upstream to BLM / Forest Service lands (like the Edson Creek area) for equipment use.
Winter storms wash gold down from the mountains. The best time to prospect is after a king tide or heavy storm event has reshaped the beach.
It is fast, wet, and windy. This is not majestic sunny prospecting. It is rugged. Dress in layers and bring rain gear.
The gold here is extremely fine (flour). You need a "Gold Cube" or fine matting to catch it. Riffles will lose it all.
The black sand (magnetite/hematite) is so heavy here it will clog your pan instantly. **Bring a strong magnet.** Use it to carefully lift the magnetic black sand off your concentrates, leaving the gold behind. Do this dry if possible.
Strategic weight valuation. Calculate the spot yield of your discovery and bridge the target gap to a physical ounce.
"The gap to a full ounce is only 30.10 grams..."
Optional gold-culture references for readers curious about bars, coins, purity and storage language after prospecting. These are third-party resources, not financial advice.
Third-party resource for learning how vaulted physical gold services describe storage, fees and custody.
Useful for comparing bars, coins, premiums and purity language after learning field testing basics.
Browse mainstream bullion product formats and premiums as gold-culture background, not prospecting advice.
Reference catalogue for seeing common retail names, weights and purity markings used on coins and bars.
Land access rights, safety conditions, and public fossicking zones change. You are solely responsible for verifying regulations with local authorities (DOC/Council/BLM) and assessing river safety before visiting. Paystreak.io accepts no liability for injury, fines, or trespassing. Never dig on private land without explicit permission.
✓ Information last verified: January 2026