An unnamed sea natural arch, Del Norte County, California
Photo by Mike Higgins
NABSQNO 10T-399260-4645130. This unnamed sea natural arch eroded through a high promontory of Prince Island. It is located about 3 miles south of the Oregon border and 4 miles west of Smith River, Del Norte County, California. Although the arch is visible from shore, the best view is from the ocean side of the island. It is probably the northernmost natural arch in California. The arch has a span of about 25 feet.