Where: Washington · North America · approx. 48.42, -122.15 (vicinity only)
Why this spot: Rockhounding locality: chalcedony and quartz geodes in andesite near Mount Vernon
What turns up: chalcedony geodes, quartz-lined geodes, agate
Access: Open / legal.
Free public geode digging on WA DNR land at the Walker Valley site within posted rules and personal-use limits.
Open in Mudlark Map →
Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.
Pins are approximate by design. This page is historical research, not permission to dig. Check ownership and local law first.