Moonstone (formerly, Little River) is an unincorporated community in Humboldt County, California. It is located 2.5 miles (4.0Â km) southeast of Trinidad, at an elevation of 121 feet (37 m). For census purposes, it is aggregated in Westhaven-Moonstone, California. The area is sited adjacent to Pacific Ocean beach and the mouth of the Little River with views of the rugged coastline.
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