Thanks for reminding me of this piece of fiction. I downloaded the county shapefiles to find that the southern end of this is actually Humboldt Lagoons SP, the central is an odd bulge in the US 101 ROW (so national) and the north is Redwood NP. Not one square inch is county land. Humboldt County does own a piece of wooded land closer to Orick.

So I hit the delete button on the (2!) shapes of county beach, found it didn't affect anything but the relation of the "county beach" and hit update. May it purge quickly from all cache.