Eel River Gravels

Mendocino County is generally considered the best region in Northern California to find jade, and the gravels along the Eel River — particularly the North Fork, near Mina — are documented jade ground, producing both jadeite and nephrite in colors ranging from green to white to black [1][2]. Placer jade here has eroded out of the surrounding serpentine-belt rock and washed downstream, the same way California's better-known coastal jade deposits work, just inland along a river instead of a beach. The BLM manages significant public stretches of the Eel River corridor as part of the Eel Wild and Scenic River program, including popular put-ins like Dos Rios, but the surrounding land is a real patchwork with private timber holdings — so which gravel bar you're standing on matters.

The batch coordinate (39.71395, -123.35262) sits in Mendocino County, near Laytonville and Leggett [reverse geocode]. The documented jade locality on the North Fork Eel River sits near Mina, in the same general stream system [2]. BLM-managed public access points along the broader Eel River corridor include the Red Mountain and Cahto Peak units and the Dos Rios put-in [3].

Gravel bar surface picking is the standard method for placer jade — walking exposed river gravel after high water has reworked the streambed, looking for waxy green, white, or black material. A rock hammer and a way to test specific gravity (to distinguish jadeite from nephrite) are useful. This is general placer-jade technique, not confirmed specifically for the batch coordinate.

UNVERIFIED: exact land ownership at this specific coordinate is not confirmed. The BLM manages public stretches of the Eel River corridor under the Eel Wild and Scenic River program, but this is redwood-region Northern California where large private timber holdings are common along river frontage [3]. Confirm whether the gravel bar you want to work is BLM or private before collecting.