Tillamook Bay is 6 miles long and 2 miles wide. It has 5 main rivers flowing into it, whose waters compete with the ocean’s tides.
Nearly plumb in the middle of the narrow, constantly-rushing-one-way-or-the-other channel between the bay and the ocean sit three large rock formations (or four or five if you count the smaller ones…) that have been named the Three Graces.
US 101 runs very close beside the channel where they sit just north of Garibaldi, so they provide views night and day as we drive north and south along that route.
Because the roadway is slightly elevated as it passes the closest rock, you may not notice an arch….
I’m intrigued that so many arches occur perpendicular to the usual direction of water flow. which is true here.