Kelso

Kelso sits where the Coweeman and Cowlitz rivers meet just above the Cowlitz's own confluence with the Columbia, in southwest Washington's Cowlitz County. The wider Cowlitz-Columbia river system is a known agate-bearing gravel corridor — collectors work the Toutle River and its tributaries as well as Columbia River bars for agatized wood and sagenite agate. That's real regional context, but it's not the same as a documented find spot at this exact point on the map, and it's not the same as confirmation that this stretch is open to the public. Land ownership along Washington's major rivers is a patchwork of state-owned aquatic land, DNR trust land, and private frontage, and the rules differ by owner. Treat Kelso as a jumping-off point into agate country rather than a named, verified site — confirm access before you dig in.

Kelso is on I-5 in southwest Washington, at the Cowlitz-Columbia confluence, across the river from Longview. Public boat ramps and riverside parks in the Kelso-Longview area give walk-in access to gravel bars on the Cowlitz and Columbia; which specific bar (if any) is productive and legally collectible is unverified.

UNVERIFIED for this specific location. General river-gravel technique for this region: walk exposed gravel bars after high water or flood events, when fresh material has been reworked and sorted; agate concentrates where current slows. No digging or excavation implied — this is surface/wading collecting only.

Washington DNR's own rockhounding guidance says land ownership determines the rules, and collectors are responsible for knowing who owns the ground before they collect — DNR-managed state trust land is largely closed to rockhounding with limited exceptions, while state-owned aquatic land may allow personal collecting but DNR recommends contacting its Lands Mining & Minerals Program directly first. National parks, wildlife refuges, and tribal land are closed outright. Given that ambiguity, and no site-specific confirmation for Kelso, land status here is UNVERIFIED — confirm ownership and get permission (or DNR sign-off) before visiting. Gold panning specifically requires a Hydraulic Project Approval from WDFW regardless of land ownership.