Newaukum River Gravels

The Newaukum River, east of Chehalis in Lewis County, Washington, cuts through Pleistocene glacial outwash gravels that the Missoula floods reworked and sorted — the kind of geology that concentrates agate and chalcedony nodules where a river has been winnowing gravel for thousands of years. Collectors report carnelian agate along the river's gravel bars, with geodes turning up on a tributary creek off the North Fork specifically. Access is informal: roadside pullouts along US-12 east of Chehalis, then a walk down to the gravel. It's not a developed or signed site — just a river Washington rockhounds have quietly worked for a long time, good for an afternoon of gravel-bar picking rather than a destination trip.

From Chehalis, take US Highway 12 east toward Morton for roughly 12 miles, watching for informal pullouts on the north side of the highway near the Newaukum River.

Surface picking through active river gravels — flat to gently rolling terrain, uneven and rocky footing, occasional wet patches near the water. Most productive collecting is reported within 100-300 yards of the parking pullouts. No tools beyond a hand rake or sieve are typically needed for gravel-bar picking.

Land ownership along this stretch of the Newaukum River — public road right-of-way vs. adjacent private riverfront — was not independently confirmed. Washington generally allows casual rock collecting in active streambeds below the ordinary high-water mark on many rivers, but this dossier could not confirm that rule applies specifically to this stretch. Confirm you're staying within any public right-of-way and off private riverbank property before collecting.